CCEA GCSE Specimen Assessment Materials for Digital Technology · 2019. 9. 23. · CCEA GCSE Specimen Assessment Materials for Digital Technology Updated: 13 November 2018 For first

CCEA GCSE Specimen Assessment Materials for

Digital Technology

Updated: 13 November 2018

For first teaching from September 2017 For first assessment in Summer 2018 For first award in Summer 2019 Subject Code: 2650 and 2610

GCSE

GCSE_DT_SAMs_V1_Updated 13.11.18

ForewordCCEA has developed new specifications which comply with criteria for GCSE qualifications. The specimen assessment materials accompanying new specifications are provided to give centres guidance on the structure and character of the planned assessments in advance of the first assessment. It is intended that the specimen assessment materials contained in this booklet will help teachers and students to understand, as fully as possible, the markers’ expectations of candidates’ responses to the types of tasks and questions set at GCSE level. These specimen assessment materials should be used in conjunction with CCEA’s GCSE Digital Technology specification.



GCSE Digital Technology Specimen Assessment Materials

Contents

Specimen Papers 3

Unit 1 (Compulsory Core) Digital Technology 3Unit 2 Digital Authoring Concepts 23Unit 3 Digital Authoring Practice 47Unit 4 Digital Development Concepts 53Unit 5 Digital Development Practice 73

Mark Schemes 77

General Marking Instructions 79Unit 1 (Compulsory Core) Digital Technology 83Unit 2 Digital Authoring Concepts 93Unit 3 Digital Authoring Practice 105Unit 4 Digital Development Concepts 109Unit 5 Digital Development Practice 123


Subject Code 2650 and 2610

QAN 603/1122/8

A CCEA Publication © 2017

You may download further copies of this publication from www.ccea.org.ukGCSE_DT_SAMs_V1_Updated 13.11.18

SPECIMEN PAPERS



Centre Number

Candidate Number

General Certificate of Secondary Education2018

For Examiner’s use only

Question Number

Marks

1

2

3

4

5

6

7

8

9

10

11

12

13

14

TotalMarks

TIME1 hour.

INSTRUCTIONS TO CANDIDATESWrite your Centre Number and Candidate Number in the spaces provided at the top of this page.Write your answers in the spaces provided in this question paper.Answer all fourteen questions.

INFORMATION FOR CANDIDATESThe total mark for this paper is 90.Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each or part question.Quality of written communication will be assessed in question 11(b) and 12.

Digital Technology

[CODE]SPECIMEN PAPER

Unit 1:

(Compulsory Core)

Digital Technology

3GCSE_DT_SAMs_V1_Updated 13.11.18

Examiner Only

Marks Re-mark

4

1 Insert the appropriate letter in the space provided.

(a) The law designed to protect against software copying is:

A The Copyright, Designs and Software Act.B The Copyright, Designs and Patents Act.C The Copyright, Data and Patents Act.D The Computer, Data and Software Act.

[1]

(b) Selectthestatementwhichistrueaboutflashmemorytechnology.

A It has no moving parts and consumes very little power.B It operates using read write heads and is used to store data.C It has no moving parts and requires a large power supply to

operate.D It operates using read write heads and consumes very little power.

[1]

(c) Selectthestatementwhichistrueaboutfibreopticcable.

A It carries data in pulses of light but is prone to interference.B It carries data as electronic signals and is not prone to

interference.C It carries data as electronic signals and is prone to interference.D It carries data in pulses of light and is not prone to interference.

[1]

(d) Select the statement which describes the role of the data controller inan organisation.

A Controls the way in which personal data is processed by the organisation.

B Is the individual who provides information to the organisation for processing.

C Controls the hardware the organisation uses to process the data.D Is responsible for making the public know about their rights.

[1]

(e) Select the statement which describes the role of the InformationCommissioner.

A Must seek permission from companies to store personal data.B Is responsible for writing the Data Protection Act.C Collects personal data for use by other companies.D Enforces the Data Protection Act.

[1]


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5

2 Jack’s school uses a form to collect data from new students. The data is used to create information that can be used by the school. Place a tick () beside two statements that are true about information.

STATEMENT TICK ()

Informationisrawfactsandfiguresthathavenotbeengiven a meaning.

Information can be produced by processing raw data.

Information is automatically encrypted when it is produced.

Informationisrawfactsandfiguresthathavebeengivena context.

[2]


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6

3 Sarah’s dad is a professional photographer. He sometimes has to edit the images he has taken.

(a) Give two reasons why he should save his photographs in bitmapformat.

1 [1]

2 [1]

(b) List two differences between bitmap and vector-based graphics.

1 [1]

2 [1]


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7

4 Many mobile phones can now record digital video and sound. Use some of the words given below to complete the paragraph which

explains the process of recording and storing digital sound files.

analogue memory digital microphone speaker

Mobile phones have a built-in to record sound.

Sound is input in format and is then converted into

format so it can be stored in the phone’s memory. [3]


Examiner Only

Marks Re-mark

8

5 Jason’s laptop has the latest version of an operating system installed.

List two functions Jason can expect the operating system to perform.

1 [1]

2 [1]


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9

6 MM Books is an online company selling e-books. A data table is used to store information about the e-books for sale. Part of the data table is shown below.

Book-ID Genre AuthorForename

AuthorSurname Price Book

TitleDate

PublishedB2U113372 Children Bill Chance £2.99 Daredevil

Dave03/05/2012

B2U313649 Fiction Timothy Walsh £7.99 EternalDreams

07/09/2011

B2U415985 Comedy David Keyes £4.99 Watchthis Space

08/02/2012

B2U629649 Science Fiction

Sharon Robson £5.99 Aura of Mercury

06/11/2011

B2U766299 Mystery Amir Relf £4.49 MaceyInvestigates

24/08/2013

B2U784623 Horror Cate Smythe £6.49 Within these Walls

04/04/2011

B2U814222 Fiction Melinda Mayse £5.99 The Room Upstairs

20/10/2013

B2U946121 Children Daphne Speirs £1.99 Kate’s Castle

30/08/2012

B2U911249 Historical Alice Kismet £3.99 The Young Princes

25/01/2012

(a) Howmanyfieldsareshowninthispartofthedatatable?

[1]

(b) What search criterion was used to select the two records shown below?

A search produces the following output:

B2U113372 Bill Chance £2.99 Daredevil Dave 03/05/2012B2U946121 Daphne Speirs £1.99 Kate’s Castle 30/08/2012

[2]


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10

(c) Data validation is used by MM Books to make sure the data in the data table is reasonable.

Tick () two boxes which show common methods of data validation.

Tick ()

Range Check

Heading Check

Sort Check

Report Check

Presence Check [2]


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11

7 A landscape gardener has produced a spreadsheet to work out the cost of materials used to put up a garden fence for a customer.

A B C D E F1 Materials Unit Price VAT Selling

PriceNumber needed

Total Price

2 Fence posts £10.50 £2.10 £12.60 11 £138.603 Fence Panels £35.00 £7.00 £42.00 10 £420.004 Cement - bag £11.50 £2.30 £13.80 2 £27.605 Sand - bag £7.75 £1.55 £9.30 3 £27.906 Gravel - bag £8.99 £1.80 £10.79 4 £43.157 Stones - bag £9.45 £1.89 £11.34 1 £11.348 TOTAL COST OF MATERIALS £668.599 VAT rate 20%

(a) Identify the formatting used to present the label ‘TOTAL COST OF MATERIALS’

[1] (b) WritedowntheformulayouwouldexpecttofindincellF8.

[2] (c) The formula in cell C2 is replicated down column C. State what is meant by the term replicate.

[1]

(d) Explain why the cell reference $B$9 is used in the cell C2, instead of using B9.

[2]

© CCEA


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12

(e) Identify two cell ranges which have been used to create the graph shown below.

1

2 [2]

(f) Explain how the gardener could use the spreadsheet model to ask ‘what if’ questions to help keep costs within the customer’s budget.

[2]

£500.00

£375.00

£250.00

£125.00

£0.00Fence posts Fence panels Cement - bag Sand - bag Gravel - bag

© CCEA


Examiner Only

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13

8 The CPU is sometimes called the brain of the computer.

(a) Expand the acronym CPU.

[1]

(b) Identify the main purpose of the CPU.

[1]

(c) The terms given below are parts of the CPU. Complete the table by matching each part of the CPU to the statement which best matches the role it carries out.

ALU Control Unit Immediate Access

Store

Statement Part of the CPU that carries out this role

Holds programs and data currently in use

Performs calculations and logical operations

Tells input and output devices how to carry out instructions

[3]

(d) Use the words given below to complete the paragraph to describe the role played by each of the registers when executing a program.

Memory Address

RegisterMemory Data

RegisterProgram Counter

When a computer program is running the

holds the address of the next instruction. The location of the next

item of data to be fetched is stored in the .

When a data item is fetched from memory it is stored in the

. [3]


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14

(e) Give one reason why ROM is suitable for storing the boot-upprogram.

[1]

(f) (i) List one possible use for cache memory.

[1]

(ii) Explain how the cache size can impact on CPU performance.

[2]


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1515

9 Paul uses communication technology to link electronic devices in his home to the Internet of Things (IoT).

(a) Explain what is meant by the term ‘the Internet of Things’.

[2] Paul uses Wi-Fi to link his mobile phone to the Internet when he is at

home.

(b) (i) Give one advantage of using Wi-Fi in this way.

[1]

(ii) Give two disadvantages of using Wi-Fi in this way.

1

[1]

2

[1]

Paul has set up a LAN (Local Area Network) in his home. His devices are set up in a Bus topology.

(c) (i) Describe two features of a Bus topology.

1

[1]

2

[1]


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16

(ii) Name one other network topology and describe two of its features.

Topology [1]

Feature 1

[1]

Feature 2

[1]

Paul also uses a LAN in his job with an estate agent.

(d) List two advantages of using a network in an organisation.

1

[1]

2

[1]

(e) Describe the function of the following network resource.

Network Interface Card

[2]

(f) Describe what a router is and what it does.

[2]


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17

10 Many computer users are worried about malware.

(a) In the table below tick () two examples of malware.

Malware Tick ()

Firewall

Worm

Router

Virus [2]

Computer systems and data can be protected using encryption and firewalls.

(b) (i) Explain how encryption can be used to protect data.

[2]

(ii) List twowaysafirewallcanprotectdatastoredona computer.

1

[1]

2

[1]


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18

11 Cloud computing has had an impact on the way some organisations operate.

(a) Explain what is meant by the term ‘cloud computing’.

[2]

(b) Describe three advantages of cloud computing to an organisation.

Quality of written communication will be assessed in this question.

[6]


Examiner Only

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19

12 Cyberspace has provided a new location for crime to be committed.

Explain the term cyberspace and describe two examples of cyber crime.


Cyberspace

Example 1

Example 2

[6]


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20

13 Regular use of computers can lead to health and safety issues.

(a) List three measures employers must take to support safe use of computers in the workplace.

1 [1]

2 [1]

3 [1]

The use of technology may cause health problems.

(b) Identify two health problems users may suffer from over use of technology.

1 [1]

2 [1]


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21

14 Using the terms in the list below choose one term that best matches the definition in the left hand column (not all terms will be used).

WAN Intranet Real time processing Upskilling Batch processing

Computer Misuse Act Consumer Contracts Regulations

GPS Wi-Fi Bluetooth Job displacement Data Protection Act

Definition Term

A radio navigation system that allows users determine their exact location.

Legislation implemented to give you rights when shopping online.

A situation where a long-standing employee is removed from their original job and provided with an alternative job within the same organisation.

A processing method where the input is dealt with quickly enough so as to be able to control an output properly.

A private network or website only available to members of an organisation. Not limited by geographic location.

A wireless technology standard for exchanging data over short distances.

[6]


THIS IS THE END OF THE QUESTION PAPER



Question Number

Marks

1

2

3

4

5

6

7

8

9

10

11

12

TotalMarks

TIME1 hour 30 Minutes.

INSTRUCTIONS TO CANDIDATESWrite your Centre Number and Candidate Number in the spaces provided at the top of this page.Write your answers in the spaces provided in this question paper.Answer all twelve questions.

INFORMATION FOR CANDIDATESThe total mark for this paper is 120.Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question.Quality of written communication will be assessed in question 8.

Digital TechnologyUnit 2

Digital Authoring Concepts


23

Centre Number

Candidate Number



Examiner Only

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24


(a) Select one statement which correctly describes the content of a movie timeline.

A Titles, credits, still images, effects, transitions and page layout. B Scene duration, title, credits, still images, effects, transitions. C Scene duration, title, credits, macros, still images, transitions. D Titles, credits, effects, scene duration, movie reports.

[1]

(b) Select one statement which is true about system testing.

A It is carried out by the end user. B Involves testing each section of the system as soon as it is

developed. C It is carried out after the system has been running for a period of

time. D Involves testing how all components of the new system work

together.

[1]

(c) Select the file list containing optimised image file formats only.

A gif, bmp, wmv B bmp, jpg, wmv C gif, wmv, png D gif, png, jpg

[1]

(d) Some database reports use grouping to present information.

Select the advantage of using grouping in reports.

A Provides the user with an ordered list so the information is easier to read.

B Provides the user with summary data relating to all records in the report.

C Provides the user with a design layout so the fields can be moved around.

D Provides the user with a method of adding data to a table in the database.

[1]


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25

(e) Templates are often used when creating packages.

What is a template?

A A predesigned layout which contains what will appear on some page of the completed package.

B A file format which can be used to create optimised video files for use in a package.

C A predesigned layout which cannot be changed to stop the user editing the package content.

D A file format which can be used to create other pages in an authoring package.

[1]

2 John is creating a multimedia solution for his company Design Inc.

(a) Explain the role of the end user in developing a prototype of a digitalsystem.

[2]

(b) Explain the purpose of the following elements when designing amultimedia solution.

(i) Storyboard

[1]

(ii) Navigational plans

[1]


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26

3 City Cycles is a company that sells bicycles. The company has decided to develop a new computer database system for storing their stock details.

The designers have produced wireframes for their input forms.

(a) List three items the designer would include in a wireframe for a form design.

1 [1]

2 [1]

3 [1]

(b) What is the purpose of the data dictionary in database design?

[2]

(c) Explain the purpose of an ER diagram in database design.

[2]


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27

City Cycles is using the following table to store information about the bicycles for sale.

Stock_ID Bike_Name Supplier_ID Selling_Price

Bike 11 Trak black bike Su001 £399

Bike 12 BMZ Racing bike Su001 £189

Bike 13 Mountain Hill bike Su002 £159

Bike 14 Hybrid Bike Su004 £99

An additional table is needed to store supplier details.

(d) Complete the data dictionary below to aid in the design of the Supplier Table.

Field Name Data Type

Field Length

[1]Description

Supplier ID[1]

5[1]

Key Field

StreetNum text 4 Length Check Contains Street Number

Street Name text 30 Length

Check Contains Street name

Town text 30 Presence check Contains town

Postcode[1] [1]

Format check

Display following format for data entry__ __ __ __ __ __ __


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28

4 A Graphical User Interface is one type of interface used for interacting with computer systems.

(a) Name two ways a user can interact with a computer.

1

2 [2]

(b) Use the terms given below to complete the table and match theapplication descriptions with the most suitable interface type.

Natural Language Interface

Graphical User Interface

Touch screen Interface

Application description Most suitable interfaceA voice controlled home heating system

A cinema ticket collection system

A tablet device

[3]


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29

5 As part of her GCSE controlled assessment Amy is developing a multimedia package that she wants to run across a number of platforms.

(a) Explain what is meant by the term ‘Multimedia Authoring’.

[2]

(b) Describe how each of the following can help her package run across a number of platforms.

(i) Use of plugins

[2]

(ii) Portable Document Format

[2]


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30

(c) Amy has optimised her graphics before adding them to a multimediapackage.

(i) Explain what is meant by the term ‘optimised’.

[2]

(ii) Explain why graphics should be optimised before they are addedto a multimedia package.

[2]

(d) Describe two ways Amy can ensure her multimedia package isaccessible to visually impaired users.

1

2

[4]


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31

(e) Explain how Amy could effectively test the following elements in her multimedia package.

Navigation

[2]

Multimedia Assets

[2]

Load times

[2]


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32

6 Below is an extract of an invoice created using the report feature of a database application.

(a) On the invoice below, circle two items of data which could be created using calculated fields.

[2]

(b) What is a macro?

[2]

© CCEA


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33

(c) The database contains three tables. They are linked using one-to-many relationships as shown below.

(i) Explain what is meant by a one-to-many relationship using the above example.

[2]

(ii) Identify one other type of relationship that could be used in a relational database.

[1]

(d) Relational databases can help reduce data redundancy.

Explainwhatismeantbytheterm‛dataredundancy’.

[2]

© CCEA


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34

(e) (i) Complete the design view query shown below to show how you could search for all of the completed orders for the customer with CustomerID = 1

[2]

(ii) State how the OrderComplete? field can be hidden in the query result.

[1]

(f) The following criteria is used to select all customers who live in Larne: Town = “Larne”.

Write down the criteria that would be used to select all customers who live in Belfast and have ordered before 27th June 2014.

[3]

© CCEA


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3535

(g) The business owner thinks that a lookup list would be a useful feature in the Product table under the Category field.

(i) Give one advantage of using a lookup list for data entry.

[1]

(ii) Give one disadvantage of using a lookup list for data entry.

[1]

(h) The business owner uses mailmerge to send a letter to all customers who have purchased ProductID 17 from them.

Outline the steps they would have to follow to do this.

[3]


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36

7 Testing is important when developing a solution.

The following is an extract of the design for a database table which will store stock details for a small book store.

Field Heading Data Type DescriptionBook ID Numeric Keyfield

Book Title Text Length 30Requiredfield

Category TextUses Lookup list to choose Fiction or Non-Fiction

Number In Stock Numeric Must be between 0 and 10

(a) Complete the test plan below to show how you could test some parts of the database.

Test Number

Field to be tested Purpose of test Test data

1 Book ID Checkthefieldcannotbe left blank

No data

2 Book ID Test that only numeric data can be entered intothefield [1]

3 Book Title Checkthefieldcannotbe left blank

No data

4 Book Title Check that

[2]

Enter 31 random letters and numbers

5 Category Check that

[1]

History

6 Number In Stock

[1]

0

7 Number In Stock

[1]

21


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37

(b) Explain the following approaches to testing.

Term ExplanationBlack Box Testing

[2]White Box Testing

[2]Alpha Testing

[2]


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38

(c) Explain how the following types of data are used to test a system.

Invalid data

[2]

Extreme data

[2]


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39

8 ‘E-Fresh’ currently sells fresh dairy produce throughout the UK. They have a basic website used to advertise their products. The owner wants to make the website more interactive.

Identify how the addition of an online purchasing system and a messaging system to the website might:

• benefit E-Fresh; and• impact on the management of the website.


BenefitE-Fresh

Impact on the management of the website

[6]


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40

9 Ben wishes to record sound for his newly developed website.

(a) Describe two factors that can affect the quality of digital audio.

1

2

[4]

(b) Howdoessamplerateaffectthesizeofthestoredfile?

[2]

(c) Sound commands are used on mobile devices.

Identify two problems associated with voice recognition.

1

2

[2]


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41

10 (a) Complete the paragraph below using the words listed to explain the importance of system evaluation.

limitations user documentations developer

end user target audience refinements

user requirements

When a computer system is completed the [1]

in the first instance will check the completed system against a set

of [1] to see if they have all been met. After the

evaluation any [1] of the system will be identified

which may lead to further [1] of the system design. [4]

(b) A large number of people may be involved in the evaluation process.

List two methods of fact-finding which could be used to collect information during the evaluation process.

1 [1]

2 [1]


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42

11 There are many software packages and online applications available to help people develop their own websites. Websites are written using HTML.

(a) Expand the acronym HTML.

[1]

(b) (i) The table below contains some common elements/tags found in html code. Explain what each piece of code means.

<h1> [1]

<p> [1]

<a> [1]

<i> [1]

<b> [1]


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43

(ii) Look at the code below and tick the box which shows what this code will display. [1]

<html> <head> <title>GCSE Digital Technology</title> </head> <body> <h1> Multimedia Authoring </h1> <p>Welcome to my GCSE Digital Technology Webpage </p> </body> </html>

GCSE Information Technology

Multimedia Authoring

Welcome to my GCSE Digital Technology Webpage

GCSE Digital Technology


Welcome to my GCE Digital Technology Webpage


Multimedia Authoring Welcome to my GCSE Digital Technology Webpage


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44

(c) Use the term given below to complete the table describing the features of many website design packages.

Hotspot Hyperlink Layer Tables

Features of web design packages Correct term

Used in web pages to organise text and other multimedia elements into rows and columns

[1]

A tool that can be used to place text and other multimedia elements on a web page

[1]

An element on a web page that when clicked on will take the user to another website, web page or document

[1]

An area of a graphic that when clicked will cause an action on a web page

[1]

(d) When creating web pages they can be viewed in design view and

preview mode.

Explain the terms design view and preview mode.

Design View

[1] Preview Mode

[1]


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45

12 Using the terms in the list below choose one term that best matches the definition in the left-hand column (not all terms will be used).

Boolean System testing Black box Script Pixel

Requirements HTTP Prototype Beta testing

Definition TermA protocol used to send and receive web pages

[1]The smallest area that can be edited on a graphic

[1]A data type used when the data can have only two values

[1]The second phase of software testing in which a sample of the intended audience tries the product out

[1]An initial version of a multimedia product. It is tested to make sure it meets user requirements

[1]


THIS IS THE END OF THE QUESTION PAPER



Research for all tasks can be completed under limited supervision.

All other elements of the tasks must be completed under informal supervision (medium level of control).

You have a total of 36 hours to complete the tasks:18 hours on Multimedia solution18 hours on Database solution

The total mark for this Unit 3 Controlled Assessment Task is 60.

Controlled Assessment Tasks must comply with the Regulations as detailed in Subject Specification

Candidates’ work to be submitted June 2019

Digital Technology

47

Unit 3:

Digital Authoring Practice

Valid from September 2017


48

Sample Controlled Assessment Task

Unit 3: Digital Authoring Practice

Scenario

Dan and Mairead are setting up an ICT training company named ‘Solutions’.Their target audience is primary and secondary school students. They aim to offer a number of multimedia and software programming courses, ranging from two to eight weeks in duration. Solutions require the development of the following:

1 Dan and Mairead have requested a multimedia package to advertise Solutions. The package should be aimed at parents and students and should contain detail about Solutions, their staff, available courses and fees. The package should make use of the following features of a multimedia package: templates; hypertext; optimised media types; scripted elements; and accessibility elements.

2 A database booking to record relevant details about students, tutors and courses. The

database is for use within the company and will be used to produce detailed output for tutors and the company owners (in the form of query results and reports) to support the day-to-day operation of the company, bills for parents to be paid in advance of taking the courses. The database should make use of the following database features: tables; a range of validation techniques; forms; complex queries; professional reports; and macros.

This unit requires the practical application of the processes associated with the design, development and testing of digital multimedia systems.


49

Task Guidance

1 Designing a solution using appropriate tools [13 marks]

(a) Multimedia solution The design for the multimedia element of the solution should include:

• identification of the user requirements and target audience for the proposed solution;

• navigational structure diagrams;• detailed storyboards for all elements of the solution (pages, video and animation).

Storyboards should also include detail of any interactive and accessibility elements used throughout the package;

• detail of images (including image source) and sound files used within the package;• description of any scripted elements used within the package;• description of any accessibility elements used within the package; and• evidence of prototyping to include A/B testing and the use of user feedback in

refining the solution throughout the design process. [6] (b) Database solution The file required for this task can be downloaded from the CCEA website (www.ccea.org.uk/___). The filename is ______________.xls

The file is available in Excel format but centres may adapt the format to suit their own needs. Data should be imported as appropriate.

The design for the database element of the solution should include:• identification of user requirements;• details of all input, output and processing elements, including;

– appropriate use of field lengths, validation, lookup lists and input masks; – front end user interface; – form design; – report design (incorporating grouping, sorting, calculations, headers and

footers); – query design (simple and complex queries); – ERD; and – macro design. [7]


50

2 Building the solution [27 marks]

(a) Multimedia solution Use the following features of a multimedia authoring package to support the creation

of an interactive solution from the design document. The solution should demonstrate an understanding of accessibility issues.

The multimedia solution should include the use of:• templates (including a form);• hypertext which supports internal and external navigational links;• optimised media types, which should include:

– an original video; – an original animation; and – appropriate sound;

• scripted elements which aid the interactivity of the solution; and• accessibility elements. [13]

(b) Database solution Use the following features of a database application to support the creation of an

interactive solution which meets the user requirements identified in the design stage.

The database solution should include the use of:• tables with appropriate length checks, validation, use of lookup lists and input

masks;• appropriate relationships between tables;• forms for data input;• a menu system for ease of navigation;• complex and simple queries;• reports incorporating the use of grouping, sorting, calculations and headers and

footers where appropriate; and• macros for process automation. [14]

3 Testing the database solution [10 marks]

Create an effective test plan derived from database user requirements which:• is presented in tabular format;• tests all navigational elements, all interactive elements;• utilises appropriate test data;• shows expected output;• identifies errors;• reflects the general robustness of the system for use in evaluation; and• measures the extent to which the user requirements have been met.

Test the solution using the test plan created and document the observed outcomes from

each test.


51

4 Evaluating the multimedia and database solution [10 marks]

Evaluate the solution in terms of: • user requirements;• performance and robustness;• refinements required; and• improvements to the solution.

All documentation should be saved as one PDF.

Total marks [60]


BLANK PAGE


Centre Number

Candidate Number


53


Question Number

Marks

1

2

3

4

5

6

7

8

9

10

11

TotalMarks

TIME1 hour 30 minutes.

INSTRUCTIONS TO CANDIDATESWrite your Centre Number and Candidate Number in the spaces provided at the top of this page.Write your answers in the spaces provided in this question paper.Answer all eleven questions.

INFORMATION FOR CANDIDATESThe total mark for this paper is 120.Figures in brackets printed down the right-hand side of pages indicate the marks awarded to each question or part question.Quality of written communication will be assessed in question 3(a) and 4(a).

Digital Technology


Unit 4:

Digital Development Concepts


Examiner Only

Marks Re-mark

54


(a) Debugging is:

A typing the code for a program and saving it. B modifying the program code layout. C examining variables within the program and checking their values

for errors. D preparing the program so that it can be understood by the

computer. [1]

(b) A constant is :

A a that can be assigned but changes throughout a program. B a that cannot be assigned and remains the same throughout the

program. C a that cannot be assigned and changes throughout the program. D a that can be assigned but remains the same throughout the

program. [1]

(c) A compiler :

A allows editing of the program code. B performs all calculations within the program. C executes the program. D converts the program code to binary format. [1]

2 Complete the sentences by inserting the appropriate word from the list below.

algorithms variables programs

A program design solution can be developed using .

The designs are converted into sets of instructions for computers called

. Locations in memory called are

used to hold any data being processed.

[3]


Examiner Only

Marks Re-mark

55

3 Programming solutions can be designed using abstraction and decomposition.


(a) Explain the meaning of the terms ‘abstraction’ and ‘decomposition’.

[4]

(b) A sales person earns commission on the value of sales. The table below shows the scale of the commission.

Value Of Sales (£) Percentage CommissionBetween 1 and 999 1Between 1000 and 1999 5More than 2000 10

A program is required to calculate the commission and output it in a suitable format.

(i) The following variables will be used in the program. Suggest the most appropriate data types for them.

Variable Data TypepercentageCommission [1]

valueOfSales [1]


Examiner Only

Marks Re-mark

56

A programmer has suggested that the following represents an outline solution to the problem.

Input valueOfSales CalculateCommission Ouput Commission

(ii) Write an algorithm for calculating the commission using the percentageCommission and the valueOfSales.

[6]


Examiner Only

Marks Re-mark

57

(iii) Testing is important when developing a solution.

Explain the following approaches to testing.

Term Explanation

Black Box Testing

[2]

White Box Testing

[2]

Unit Testing

[2]

(iv) Design a set of test data values of valueOfSales, using the table below, which will test your solution.

valueOfSales Reason for Test Expected Outcome

[9]


Examiner Only

Marks Re-mark

58

4 Error trapping and validation ensure that programs work effectively for users.


(a) Explain three different validation checks that are used when developing programs, and give an example of how each could be used.

[6]


Examiner Only

Marks Re-mark

59

(b) A pottery company supplies and delivers dishes to clients. The price depends on the type of dishes required and the amount of each dish ordered. Prices are as follows:

Type of Dish PriceDish Type 1 : ROUND 12 INCH MAIN COURSE PLATE £1.00Dish Type 2 : ROUND 10 INCH MAIN COURSE PLATE £0.50Dish Type 3 : SOUP BOWL £1.50Dish Type 4 : ROUND 6 INCH SIDE PLATE £1.00Dish Type 5 : OVAL MAIN COURSE DISH - ONE SIZE ONLY £2.00

A variable called dishType has been declared. It will store the type of dish required by a client. This must be validated to ensure it is between 1 and 5.

Write an algorithm which will validate the dishType.

[4]


Examiner Only

Marks Re-mark

60

(c) A program to output the total cost to a customer has been written. The data is entered into the program as shown below:

Client’s name: Anna Greene

Type of Dish requested (1 – 5) 3

Number of Dishes required 10

The client’s name will be stored as a string.

(i) List two string functions and explain how they can be used.

Function 1

Explanation 1

Function 2

Explanation 2

[4]


Examiner Only

Marks Re-mark

61

(ii) Explain how string functions can be used to ensure client’s name is at least six characters in length and does not exceed 30 characters in length.

[2]

5 (a) Consider the following:

for i = 0 to 20 { if (i % 3 == 0) { Output i } }

In the table below, tick() the line which contains the correct output from this section of code.

Tick()

A) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20B) 0 3 6 9 12 15 18 21C) 3 6 9 12 15 18D) 0 3 6 9 12 15 18E) 3 6 9 12 15 18 21

[1]


Examiner Only

Marks Re-mark

62

(b) Consider the following:

if ((X<Y) and (Y<Z)) output(“ This is the first statement”) else if ((X<Y) or (Y>Z)) output(“ This is the second statement”) else output(“This is the third statement “)

(i) Which statement will be executed when X =7, Y =9, Z =0? Circle the correct letter.

A This is the first statement B This is the second statement C This is the third statement [1]

(ii) Which statement will be executed when X=12, Y=12, Z=18? Circle the correct letter.

A This is the first statement B This is the second statement C This is the third statement [1]

6 A program is required which will take in 10 values in pounds and output the corresponding kilogram value. The pounds will be stored in an ARRAY called pounds and the calculated kilogram values will be stored in an array called KILOS. One pound equals 0.4545 kilos. So for example:

pounds[0]=1.0 kilos[0]=0.4545pounds[1]=2.0 kilos[1]=0.9090

(a) Declare an array called pounds which will hold 10 integer values.

[3]


Examiner Only

Marks Re-mark

63

(b) Write an algorithm to initialize the contents of the pounds array to zero.

[3]

(c) Write the code required to read in the values in pounds into the array from the user screen.

[3]

7 (a) A procedural program uses sequence, selection and iteration.

In the table below circle to indicate whether the operations use a sequence, selection or iteration.

OperationsPerforming a series of operations one after the other.

Sequence Selection Iteration[1]

The calculation of an employee’s tax payment depends on their salary level.

Sequence Selection Iteration

[1]The program will continue to add the cost of a basket of items until the basket is empty.


[1]


Examiner Only

Marks Re-mark

64

(b) State what is meant by each of the following terms used in Procedural programming:

(i) Global variable

[1]

(ii) Local variable

[2]

(c) State what is meant by each of the following terms in Object-oriented programming:

(i) Class

[2]

(ii) Object

[2]


Examiner Only

Marks Re-mark

6565

(d) A programmer can use an Integrated Development Environment (IDE) to create and develop a program.

Describe the facilities available in an integrated development environment (IDE) which can help a programmer to identify and correct syntax errors.

[4]

8 (a) State what is meant by the character set of a computer.

[1]

(b) Explain how ASCII is used to represent text in a computer system.

[3]


Examiner Only

Marks Re-mark

66

(c) Unicode is also used to represent text in a computer system.

Explain the difference between the character sets of Unicode and ASCII.

[2]

9 (a) (i) Convert the denary number 36 into a binary number. (Working out must be clearly shown.)

[2]

(ii) Convert the denary number 22 into a hexadecimal number (Working out must be clearly shown.)

[3]


Examiner Only

Marks Re-mark

67

(iii) Explain why hexadecimal numbers are often used to represent binary numbers.

[2]

(b) (i) Add the following bytes:

0 1 1 0 0 0 1 0 + 1 1 0 1 0 1 0 0

[2]

(ii) Explain the problem that will occur if the result of the addition is stored as a byte.

[2]


Examiner Only

Marks Re-mark

68

(c) Complete the following truth tables:

OR GateA B X0 0 00 11 01 1 1AND GateA B X0 0 00 11 01 1 1

[4]

10 The following numbers represent pupil heights in cm. They are stored in an array called studentHeight. The content of the array is to be sorted in ascending order.

155,152,156,151,153

(a) (i) Name and describe a sorting technique which could be used to sort the numbers. Include information about:

• the loop structures used; and• the efficiency of the sort.

Name:

Loop structures used

Efficiency of the sort

[5]

[1]

[1][1]

[1]


Examiner Only

Marks Re-mark

69

(ii) Write the condition which will be used in the ‘if’ statement for a sort process.

[2]

(iii) For the method chosen in (i) on the previous page, demonstrate how the data in studentHeight would be organised during the sorting process. Show clearly the content on the array after each pass.

studentHeight

155 152 156 151 153

Pass 1

Pass 2

Pass 3

Pass 4

Pass 5

[5] (b) Once an array has been sorted it can be searched efficiently.

Describe a method of searching which is more efficient than linear search.

[3]GCSE_DT_SAMs_V1_Updated 13.11.18

Examiner Only

Marks Re-mark

70

11 A program is required to take in three numbers and output the average and product of the three numbers. A top level algorithm could be:

DISPLAY INTRO SCREEN GET 3 NUMBERS FIND AVERAGE OF 3 NUMBERS FIND PRODUCT OF 3 NUMBERS OUTPUT INFORMATION

User-defined functions could be written for each of the above.

(a) (i) What is a user-defined function?

[3]

(ii) Write a function called findAverage which will calculate the average of three integers.

[3]


Examiner Only

Marks Re-mark

71

(iii) Write a function called findProduct which will calculate the product of three integers.

[3]


BLANK PAGE



Research for all tasks can be completed under limited supervision.

All other elements of the tasks must be completed under informal supervision (medium level of control).

You have a total of 36 hours to complete the tasks

The total mark for this Unit 5 Controlled Assessment Task is 60.

Controlled Assessment Tasks must comply with the Regulations as detailed in Subject Specification

Candidates’ work to be submitted or June 2019

Digital Technology

73

Controlled Assessment Task

Unit 5:

Digital Development Practice

Valid from September 2017


74

Sample Controlled Assessment Task

Unit 5: Digital Development Practice

This unit requires the practical application of the processes associated with the design, development and testing of coded solutions when creating digital systems. The completed project must use one of the following languages: Python, Java or C#.

Scenario

Dan and Mairead are setting up an ICT training company named ‘Solutions’.Their target audience is primary and secondary school students. They aim to offer a number of multimedia and software programming courses, ranging from two to eight weeks in duration.Courses may change over time to respond to customer demand.

Dan and Mairead want a computer program to test the ICT skills of the students at the end of each week.

The program should generate six to ten multiple choice questions for each test. The system should ask for:

• student registration number;• course identification; and• course week number.

INPUTThe six to ten multiple choice questions should be displayed on screen/s. After the student inputs the answer to the question the correct answer and the score should then be displayed on screen.

STORAGEThe tutor wants to keep track of the weekly scores for each student on the course. The maximum class size is five. Store the student’s:

• registration number;• the course identification;• course week number; and• student total weekly score.

OUTPUTWhen the course is completed the tutor outputs a report of the weekly progress of the students on the course.

The tutor needs to output the following:• the weekly score for each student;• the overall grade for the course for each student (A-E); and• the average score of the class.

The program should be user friendly and provide validation and contextual help where appropriate.

Analyse the user requirements in detail.Design, code, test and evaluate a program to meet the above requirements.


75

Task Guidance

1 Design a solution using appropriate tools [13 marks]

• Use algorithms to design a fully decomposed solution to a given problem.• Specify the data requirements for a proposed solution.• Include suitable input, output and navigation design to enable a user to

successfully use the system.• Use validation and error trapping proposals in the design to improve the potential

robustness of the system.

2 Building a solution [27 marks]

Use the appropriate features of an integrated development environment (IDE) to support the creation of a solution from a structured design:• Code editor;• Simple debugging tools;• Compiler;• Error diagnostics;• Runtime environment; and• Graphical User Interface, where appropriate.

Use the appropriate features of a programming language to build a solution from a structured design:• Data Types:

– numeric; – character; – string; – boolean; and – date/time.

• Control structures: – conditional execution: if; – conditional execution with alternative: if else, case; and – looping: for, while, repeat.

• Functions:

– user defined functions; – inbuilt functions; and – mathematical functions.

• Data structures:

– arrays; and – reading from and writing to text files.

• String handling:

– using simple string handling functions.


76

• Basic arithmetic: – addition, subtraction, multiplication and division; – powers/ exponentials; and – modulo arithmetic.

• Logical and Relational operators (and complex combinations thereof)

– equal to / not equal to; – <, >, <=, >=; and – logical AND, OR and NOT.

3 Testing the solution [10 marks]

Create a test plan which:• is presented in tabular format;• incorporates black box and white box testing;• utilises appropriate test data;• shows expected output;• identifies runtime and logic errors;• reflects the general robustness of the system for use in evaluation; and• measures the extent to which the user requirements have been met.

Test the solution using the test plan created and document the observed outcomes

from each test.

4 Evaluate the solution [10 marks]

Evaluate the solution in terms of:• user requirements;• performance during testing;• refinements required following testing; and• robustness of the system.

All documentation should be saved as one PDF.

Total marks [60]


MARK SCHEMES



General Certificate of Secondary Education

GENERAL MARKING INSTRUCTIONS

Digital Technology


80

General Marking Instructions

IntroductionMark schemes are intended to ensure that the GCSE examinations are marked consistently and fairly. The mark schemes provide markers with an indication of the nature and range of candidates’ responses likely to be worthy of credit. They also set out the criteria which they should apply in allocating marks to candidates’ responses.

Assessment objectivesBelow are the assessment objectives for Digital Technology

Candidates must:

AO1 demonstrate knowledge and understanding of the concepts, characteristics, components and functions of digital technology;

AO2 apply knowledge and understanding of digital technology to investigate and analyse problems and propose solutions; and

AO3 design, develop and evaluate solutions to solve problems, making reasoned judgments and presenting conclusions.

Quality of candidates’ responsesIn marking the examination papers, examiners should be looking for a quality of response reflecting the level of maturity which may reasonably be expected of a 16-year-old which is the age at which the majority of candidates sit their GCSE examinations.

Flexibility in markingMark schemes are not intended to be totally prescriptive. No mark scheme can cover all the responses which candidates may produce. In the event of unanticipated answers, examiners are expected to use their professional judgement to assess the validity of answers. If an answer is particularly problematic, then examiners should seek the guidance of the Supervising Examiner.

Positive markingExaminers are encouraged to be positive in their marking, giving appropriate credit for what candidates know, understand and can do rather than penalising candidates for errors or omissions. Examiners should make use of the whole of the available mark range for any particular question and be prepared to award full marks for a response which is as good as might reasonably be expected of a 16-year-old GCSE candidate.

Awarding zero marksMarks should only be awarded for valid responses and no marks should be awarded for an answer which is completely incorrect or inappropriate.

Marking calculationsIn marking answers involving calculations, examiners should apply the ‘own figure rule’ so that candidates are not penalised more than once for a computational error.


81

Types of mark schemesMark schemes for tasks or questions which require candidates to respond in extended written form are marked on the basis of levels of response which take account of the quality of written communication.

Other questions which require only short answers are marked on a point for point basis with marks awarded for each valid piece of information provided.

Levels of responseTasks and questions requiring candidates to respond in extended writing are marked in terms of levels of response. In deciding which level of response to award, examiners should look for the ‘best fit’ bearing in mind that weakness in one area may be compensated for by strength in another. In deciding which mark within a particular level to award to any response, examiners are expected to use their professional judgement. The following guidance is provided to assist examiners.

• Threshold performance: Response which just merits inclusion in the level and should be awarded a mark at or near the bottom of the range.

• Intermediate performance: Response which clearly merits inclusion in the level and should be awarded a mark at or near the middle of the range.

• High performance: Response which fully satisfies the level description and should be awarded a mark at or near the top of the range.

Quality of written communicationQuality of written communication is taken into account in assessing candidates’ responses to all tasks and questions that require them to respond in extended written form. These tasks and questions are marked on the basis of levels of response. The description for each level of response includes reference to the quality of written communication.

For conciseness, quality of written communication is distinguished within levels of response as follows:

Level 1: Quality of written communication is limited.Level 2: Quality of written communication is satisfactory.Level 3: Quality of written communication is good.

In interpreting these level descriptions, examiners should refer to the more detailed guidance provided below:

Level 1 (Limited): The candidate makes only a limited selection and use of an appropriate form and style of writing. The organisation of material may lack clarity and coherence. There is little use of specialist vocabulary. Presentation, spelling, punctuation and grammar may be such that intended meaning is not clear.

Level 2 (Satisfactory): The candidate makes a reasonable selection and use of an appropriate form and style of writing. Relevant material is organised with some clarity and coherence. There is some use of appropriate specialist vocabulary. Presentation, spelling, punctuation and grammar are sufficiently competent to make meaning clear.

Level 3 (Good): The candidate successfully selects and uses the most appropriate form and style of writing. Relevant material is organised with a high degree of clarity and coherence. There is widespread and accurate use of appropriate specialist vocabulary. Presentation, spelling, punctuation and grammar are of a sufficiently high standard to make meaning clear.


BLANK PAGE


MARKSCHEME

Digital Technology

[CODE]SPECIMEN

Unit 1:

(Compulsory Core)

Digital Technology



AVAILABLE MARKS

84

1 (a) B The Copyright, Designs and Patents Act. [1]

(b) A It has no moving parts and consumes very little power. [1]

(c) D It carries data in pulses of light and is not prone to interference. [1]

(d) A Controls the way in which personal data is processed by the organisation. [1]

(e) D Enforces the Data Protection Act. [1]

2 STATEMENT TICK ()

Information is raw facts and figures that have not been given a meaning.Information can be produced by processing raw data.

Information is automatically encrypted when it is produced.Information is raw facts and figures that have been given a context.

[2]

3 (a) Can be edited at pixel level [1] Can adjust the resolution of picture being taken [1] [2]

(b) Any two from:

• Vector graphics do not depend on resolution for quality [1]• Vector graphics store graphics in terms of objects [1]• Objects can be easily moved around using vector graphics [1]• Vector graphics can be easily resized without impacting on quality

[1] [2]

4 Mobile phones have a built-in microphone [1] to record sound.

Sound is input in analogue [1] format and is then converted into

digital [1] format so it can be stored in the phone’s memory. [3]

5

2

4

3


AVAILABLE MARKS

85

5 Any two from:

• Provide an interface between the user and the computer [1]• Allocate internal memory (RAM) to programs and data currently being

used [1]• Controls peripheral devices [1]• Error handling [1]• Management of security [1] [2]

6 (a) 7 [1]

(b) Any from: Genre [1] = children [1] or Price [1] <= £2.99 [1] or Date published [1] between May and August 2012 [1] [2]

(c) Tick two boxes only()

Range Check [1]Heading CheckSort CheckReport CheckPresence Check [1]

[2]

7 (a) Centre/centre across selection/merge and centre [1]

(b) =sum [1] (F2:F7) [1] or =sum [1] (F2+F3+F4+F5+F6+F7) [1] [2]

(c) The formula has been copied and pasted into the other cells in the column/the formula has been dragged down [1]

(d) It is an absolute cell reference/the cell reference will not change [1] when the formula is copied/filled down into the other cells [1] [2]

(e) A2:A6 [1] F2:F6 [1] [2]

(f) The gardener could change the unit price/number needed [1] to see how this might change the total cost of the materials [1] [2]

2

5

10


AVAILABLE MARKS

86

8 (a) Central Processing Unit [1]

(b) Every piece of information that is stored or processed goes through the CPU/Carries out the instructions of a computer’s programs [1]

(c) Statement Part of the CPU that carries out

this roleHolds programs and data currently in use

Immediate Access Store [1]

Performs calculations and logical operations

ALU [1]

Tells input and output devices how to carry out instructions

Control Unit [1]

[3]

(d) When a computer program is running the Program Counter [1]

holds the address of the next instruction. The location of the next

item of data to be fetched is stored in the Memory Address Register

[1]. When a data item is fetched from memory it is stored in the

Memory Data Register [1]. [3]

(e) ROM is non-volatile/the boot up program cannot be altered in ROM [1]

(f) (i) Storing most recently used instructions/storing most frequently used instructions [1]

(ii) Cache memory provides high speed access to instructions/instruction fetches from cache are faster than instruction fetches from main memory [1]

Increased cache size means more instructions can be stored for faster access by the processor [1] [2]

9 (a) Any two from:

• Concept where all physical objects will be connected to the internet [1]

• Devices will be able to identify themselves to other devices [1] • Devices use unique identifiers to communicate or transfer data

[1] [2]

12


AVAILABLE MARKS

87

(b) (i) Any one from:

• Paul is not using his data allowance• More reliable signal• Greater download speed so better for streaming• Download speeds not affected by mobile phone network

traffic [1]

(ii) Any two from:

• Wi-fi range may be limited• Signal strength may vary depending on proximity to router• Could be subject to interference from other wireless sources• Signal may be affected if there are a large number of users

[2]

(c) (i) Any two from:

• Single cable called a trunk or backbone is used to connect all nodes

• Signals travel along the backbone in both directions• Terminators at end of the backbone• As signals/messages are passed along the backbone each

node will examine the message/signal• Node will only accept the message if it is addressed to it/if

message addressed to another node it will be ignored• If the backbone fails it will affect the entire network [2]

(ii) Star [1]

Any two from:

• Each device connects to a central node• All communication goes through the central node• Failing connection will only affect the device at the end of the

connection• Failure of the central node will affect the entire network• Can easily add additional nodes

(max [2]) [3]

OR

Ring [1]

Any two from:

• Has a token which carries messages around nodes on network

• Node will only accept the message if it is addressed to it/if message addressed to another node it will be ignored

• Communication is in one direction only• If one of the connected nodes fails the network will fail

(max [2]) [3]GCSE_DT_SAMs_V1_Updated 13.11.18

AVAILABLE MARKS

88

(d) Any two from:

• Expensive peripherals can be shared• Single copy of software is stored on file server and can be shared

with users• Communication between devices is possible• Users can share files• Users can log on to any computer to access their files [2]

(e) Allows devices to connect to the network/Provides a port for the network cable [1]

Allows devices to communicate with the server [1] [2]

(f) A router is a networking, hardware device or [1], in some cases, software in a computer, that determines the next network point to which a packet should be forwarded toward its destination or forwards data from one network to another. [1] [2]

10 (a) Malware Tick ()

FirewallWorm

RouterVirus

[2]

(b) (i) Any two from:

• Data is encoded by sending computer• Uses a software key• Data can only be decoded if recipient has same software key

[2]

(ii) Any two from:

• Prevents unauthorised access to the network• Prevents viruses from entering the network• Can prevent users from sending data out of the network [2]

16

6


AVAILABLE MARKS

89

11 (a) Any two from:

• Use of remote servers• Via the internet• To store/access/process data• Instead of your own hard drive [2]

(b) Level 0 [0] Answer is not worthy of credit.

Level 1 ([1]–[2]) The candidate refers to one [1], two [2] or three [2] advantages or

describes one advantage of cloud computing to an organisation. The candidate makes only a limited selection of advantages and use of an appropriate form and style of writing. The organisation of the material may lack clarity and coherence. There is a little use of specialist vocabulary. Presentation, spelling, punctuation and grammar may be such that intended meaning is not clear.

Level 2 ([3]–[4]) The candidate describes two [3] or three [4] advantages of

cloud computing. The candidate makes a reasonable selection of advantages and use of an appropriate form and style of writing. Relevant material is organised with some clarity and coherence. There is some satisfactory use of appropriate specialist vocabulary. Presentation, spelling, punctuation and grammar are sufficiently competent to make meaning evident.

Level 3 ([5]–[6]) The candidate fully describes all three advantages of cloud

computing to an organisation. The candidate selects and uses an appropriate form and style of writing. Relevant material is organised with good degree of clarity and coherence. There is widespread use of appropriate specialist vocabulary. Presentation, spelling, punctuation and grammar are of a sufficiently high standard to make meaning clear.

Answers may include:

• Access to automatic software updates• Cuts the cost on hardware needs• Staff can access resources from anywhere • Helps with collaboration/updates available in real-time• Provides secure back-up/supports disaster recovery• Increased security/files stored in secure environment/files not

being sent as attachments• Easy to increase storage capacity/cloud capacity if business

expands [6] 8


AVAILABLE MARKS

90

12 Level 0 ([0]) Answer is not worthy of credit.

Level 1 ([1]–[2]) The candidate mentions one [1], two [2] or three [2] of the areas

identified or discusses one area. The candidate makes limited use of spelling, punctuation and grammar. The meaning of the text is not always clear. The candidate demonstrates a limited form and style appropriate to the question. The organisation or the answer is limited. There is little use of specialist terms.

Level 2 ([3]–[4]) The candidate discusses two of the areas. The candidate makes

satisfactory use of spelling, punctuation and grammar. The meaning of the text is usually clear. The candidate demonstrates a satisfactory form and style appropriate to the question. The organisation of the answer is satisfactory. There is some use of specialist terms.

Level 3 ([5]–[6]) The candidate discusses all three areas. The candidate makes good use

of spelling, punctuation and grammar. The meaning of the text is always clear. The candidate demonstrates good form and style appropriate to the question. The organisation of the answer is good. There is good use of specialist terms.


Definition cyber space:• Computer network of worldwide network of computers• Virtual space where digitised information is communicated• Use of Internet to store/modify/exchange data• It describes the virtual space in which the electronic data of worldwide

PCs circulate

Descriptions of any of the following two examples:• Hacking • Pornography• Cyber stalking• Data theft• Denial of service• Digital forgery• Cyber defamation• Spamming [6] 6


AVAILABLE MARKS

91

13 (a) Any three from:

• Provide regular eye tests• Plan work so employees can take regular breaks• Provide appropriate work environment/description of ergonomic

furniture• Provide appropriate equipment/description of ergonomic

hardware• Provide appropriate training in the use of technology [3]

(b) Any two from:

• RSI• Back strain• Eye strain [2]

14 Definition TermA radio navigation system that allows users determine their exact location

GPS [1]

Legislation implemented to give you rights when shopping online

Consumer contracts regulations [1]

A situation where a long-standing employee is removed from their original job and provided with an alternative job within the same organisation

Job Displacement [1]

A processing method where the input is dealt with quickly enough so as to be able to control an output properly

Real time processing[1]

A private network or website only available to members of an organisation. Not limited by geographic location

Intranet [1]

A wireless technology standard for exchanging data over short distances

Bluetooth [1]

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Digital Technology

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Unit 2:

Digital Authoring Concepts


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1 (a) B Scene duration, title, credits, still images, effects, transitions [1]

(b) D Involves testing how all components of the new system work together [1]

(c) D gif, png, jpg [1]

(d) B Provides the user with summary data relating to all records in the report [1]

(e) D A file format which can be used to create other pages in an authoring package [1]

2 (a) End user provides feedback to the developer [1] to ensure that the digital system does what it is supposed to do/meets

the end user requirements [1] [2]

(b) (i) Any one from the following:

• A storyboard is a visual tool to help understand how a film, animation or even a presentation will be created

• It is a planning tool for a multimedia solution• It will identify the elements required for each stage in the

multimedia solution• Storyboard is a plan for the layout and content of the

multimedia solution [1]

(ii) Any one from the following:

• Navigational plans show the main structure of the site• How the pages will link together [1]

3 (a) Any three from:

• Logo• Field names• Headers/form title• Interactive/command buttons• Footer• User Interaction Items, e.g. input/text boxes, drop down lists

[3]

(b) Any two from the following:

• It shows the structure of the data items to be used in the database

• Defines the basic organization of a database • Includes the names and descriptions of the tables and the fields

contained in each table [2]

(c) An entity relationship diagram is a planning tool [1] it shows the relationship between the tables/data in the database [1] [2]

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(d)

Field Name Data Type Field Length Validation [1] Description

Supplier ID Alphanumeric [1]/Text [1] 5 Presence

[1] Key Field

StreetNum Text 4 Length check

Contains street numb

StreetName Text 30 Length check

Contains street name

Town Text 30 Presence check

Contains town

Postcode Alphanumeric [1]/Text [1] 7/8 [1] Format

check

Display following format for data entry

[5]

4 (a) Any two from:• Mouse• Keyboard• Touch• Speech• Sensor [2]

(b) Application description Most suitable interfaceA voice controlled home heating system Natural Language Interface [1]A cinema ticket collection system Graphical User Interface [1]A tablet device Touch Screen Interface [1]

[3]

5 (a) Any two from:

The process of creating a product, web page or a multimedia application [1] with text, sound, still images and video, and animation [1] creating navigation and other tools that allow interaction between the user and the application [1] [2]

(b) (i) Any two from:

An additional piece of software that can be downloaded [1] to add features to an application [1] enable different platforms to support different types of content (audio, video, etc.) [1]. Piece of software code [1] that enables an application or program to do something it couldn’t by itself [1] [2]

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(ii) Any two from:

Is a file format for the electronic exchange of documents [1] used to exchange documents reliably, independent of hardware, or operating system [1] ensures printed or viewed file retains the original formatting [1] a portable file that can be generated from different file types [1] it can only be read using special software [1] [2]


Files are compressed [1] reduces the image file size to facilitate storage [1] or electronic transmission across a communication link [1] [2]

(ii) Any two from:

• It will reduce the file size• Reduce the time it takes to load• Enhances the user experience [2]

(d) Any two from: Ensure the content is available in audio format [1] with explanation of

how this aids visually impaired [1] or

Allow navigation using the keyboard rather than a mouse [1] with explanation of how this aids visually impaired [1]

or Consider text sizes and styles/background colour/colour contrasts [1] with explanation of how this aids visually impaired [1] [4]

(e) Navigation

Any two from:• Click each navigation button in turn• Check that the destination is as predicted by the planning

document • Click on the links to ensure they take you to the correct place [2]

Multimedia assets Any one from:

• View all images to ensure they display correctly• Check videos play correctly• Check sound files play correctly• Check animations work as expected [2]

Loading time Test the elements in different browsers/platforms [1] to ensure the

load times are not excessive [1] [2] 20


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6 (a) Any two from:

• Total Cost• Subtotal • VAT• Grand Total [2]

(b) Any two from:

A set of commands/instructions [1] code [1] recorded/grouped together/activated by a mouse click/pressing a key [1] a short cut to a task [1] a preprogrammed command [1] [2]

(c) (i) One customer [1] can have many orders [1] or One product [1] can appear in many orders [1] [2]

(ii) One-to-one [1] or many-to-many [1] [1]

(d) Any two from:

The same data is present in more than one table [1]/data duplication [1]/increases the size of the database unnecessarily [1]/increases data inconsistency [1] [2]

(e) (i) ‘CustomerID’ criteria=1; [1] ‘OrderComplete?’ Criteria Yes/Y [1] [2]

(ii) Untick the show box in the ‘OrderComplete?’ field [1] [1]

(f) Town = “Belfast” [1] AND [1] Date Ordered <27/06/2014 [1] Exact field names required [3]

(g) (i) Any one from;

• Less chance of mistakes being made• Increased speed of data entry• Limits entry options [1]

(ii) Any one from:

List needs to be edited if new products become available [1] if error made in setting up list it will be in every record [1] [1]

(h) Any three from:

• Select only those customers who have purchased ProductID “17” [1] using query or by selecting in mailmerge process [1]

• Write a letter/open a document/create a standard letter [1]• Include merge fields in the letter [1] • Merge the letter with the selected customer’s details [1] [3] 20


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7 (a) Test Number

Field to be tested Purpose of test Test data

1 BookID Check the field cannot be left blank No data

2 BookIDTest that only numeric data can be entered into the field

Enter text e.g. letter o [1]

3 BookTitle Check the field cannot be left blank No data

4 BookTitle

Check that only 30 characters or less can be entered [1]/no more than 30 characters can be entered [1]

Enter 31 random letters and numbers

5 Category

Check that only Fiction, Non-fiction can be entered/selected [1]

History

6 NumberInStockCheck that numbers between 0-10 can be entered [1]

0

7 NumberInStockCheck that number greater than 10 cannot be entered [1]

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(b) Term Explanation

Black Box Testing

Any two from:Is a method which is used to examine software functionality [1] The tester has no idea of the internal working of the system which he is testing [1] Requirements Documentation or Functional Specification Documents form the basis of this testing [1] The tester only knows the formal inputs and expected outputs [1]

White Box Testing

Any two from:Also known as structural testing or code-based testing [1] The tester has the knowledge of the internals of a system and knows how the system is implemented [1] The tester analyses and understands the structure of the system by examining its code [1] This method of testing is one of the best methods to find the errors in the early stages of software development [1]

Alpha Testing

Any two from:An early test of new or updated software or hardware [1] Conducted by the developers or manufacturers [1] Prior to beta-testing by potential users [1]

[6]

(c) Invalid data Any two from:• Abnormal data is entered• Data that should not normally be accepted by the system • System should reject any invalid data

Extreme data Any two from:• Data at the boundary of valid data is entered• Values entered are chosen to be at the absolute limits of the

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8 Level 0 [0] Answer is not worthy of credit.

Level 1 ([1]–[2]) The candidate refers to one or two of the issues for each interactive

feature or describes one interactive feature benefit or impact. The candidate makes limited use of spelling, punctuation and grammar. The meaning of the text is not always clear. The candidate displays a limited form and style appropriate to the question. The organisation of the answer is limited.

Level 2 ([3]–[4]) The candidate describes the two issues for each interactive feature. The

candidate makes satisfactory use of spelling, punctuation and grammar. The meaning of the text is usually clear. The candidate demonstrates a satisfactory form and style appropriate to the question. The organisation of the answer is satisfactory.

Level 3 ([5]–[6]) The candidate describes fully the two issues for each interactive

feature. The candidate uses a good standard of spelling, punctuation and grammar. The meaning of the text is always clear. The candidate demonstrates a good standard of form and style appropriate to the question. The organisation of the answer is good.


Benefit E-Fresh: 24/7 availability, convenience for customers, wider market available

instant response/improved communications

Impact on the management of website: Security protocols, needs constant monitoring to deal with orders creating folders/moving files, needs constant monitoring to deal with

messages [6]

9 (a) Any two from:

• Bit depth is the number of bits available for each sample• The higher the bit depth, the higher the quality of the audio• The bit rate of a file tells us how many bits of data are processed

every second• Increasing the number of bits in each sample increases the

quality of the recording

Any two from:

• The sample rate is how many samples, or measurements, of the sound are taken each second

• The more samples that are taken, the more detail is recorded [1]the higher the quality of the audio [1]

• Compression removes some data [1] reduces the quality of the sound file [1] [4]

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(b) Any two from:

Sample rate - the number of audio samples captured every second [1] the more samples that are taken, the more detail [1]. Increases file size [1] [2]

(c) Any two from:

• Pronunciation of words • Individual accents • Not knowing the context of the words being spoken/homonyms • Quality of the input devices being used• Background noise [2]

10 (a) When a computer system is completed the developer [1] in the

first instance will check the completed system against a set of user requirements [1] to see if they have all been met. After the evaluation any limitations [1] of the system will be identified which may lead to a further refinements [1] of the system design. [4]

(b) Any two from:

• Interview • Questionnaires • Observation [2]

11 (a) Hypertext Markup Language [1] [1]

(b) (i) <h1> Defines the most important heading on the webpage [1]<p> Defines a paragraph [1]<a> Defines a hyperlink [1]<i> Defines italic text [1]<b> Defines bold text [1]

[5]

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(ii) GCSE Information Technology


Welcome to my GCSE Digital Technology Webpage



Welcome to my GCE Digital Technology Webpage


Multimedia Authoring Welcome to my GCSE Digital Technology Webpage

[1] (c)

Features of web design packages Correct termUsed in web pages to organise text and other multimedia elements into rows and columns Tables [1]

A tool that can be used to place text and other multimedia elements on a web page Layer [1]

An element on a web page that when clicked on will take the user to another website, web page or document

Hyperlink [1]

An area of a graphic that when clicked will cause an action on a web page Hotspot [1]

[4] (d) Design View: Any one from:

• Lets you edit content of web page• Lets you add text/graphics/video/animation/content to web page

Preview Mode: Any one from:

• Allows you to preview web page/website in different browsers• Allows you to see what web page/website will look like on www

[2]

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12 Definition TermA protocol used to send and receive web pages HTTP [1]The smallest area that can be edited on a graphic Pixel [1]A data type used when the data can have only two values

Boolean [1]

The second phase of software testing in which a sample of the intended audience tries the product out.

Beta testing [1]

An initial version of a multimedia product. It is tested to make sure it meets user requirements.

Prototype [1]

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Unit 3:

Digital Authoring Practice



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1 (a) Designing a multimedia solution using appropriate tools MarksThe candidate has successfully designed a high quality multimedia solution. User requirements and target audience needs have been clearly identified. Detailed planning for third party implementation is evident through: navigational structure diagrams, storyboarding (showing all elements including pages, video/animation and interactive/accessibility features). Details of all images/sound sources and scripted elements have been included. Prototyping and the use of feedback in refining the solution is evident.

[5]–[6]

The candidate has successfully designed a multimedia solution. User requirements have been identified. Planning for third party implementation is evident through: navigational structure diagrams, storyboarding (showing the majority of all elements including pages, video/animation and interactive/accessibility features). Prototyping has been attempted and there is some feedback in refining the solution.

[3]–[4]

The candidate has designed a limited multimedia solution. User requirements have been poorly identified. Some planning is evident through: navigational structure diagrams and storyboarding.

[1]–[2]

Not worthy of credit. [0]

1 (b) Designing a database solution using appropriate tools MarksThe candidate has successfully designed an appropriately structured relational database with all relevant fields. There is detailed planning of required database features, for example linking tables illustrated using an ERD, key fields, validation checks and data capture forms. User requirements have been clearly identified with details of all input, output and processing included. The front end user interface, forms, reports (grouping, sorting, calculations), queries (complex) and macros have been designed to allow for third party implementation.

[5]–[7]

The candidate has designed an adequate relational database with some relevant fields. The candidate has planned some database features appropriately for example two to three of the following: reference to how the tables in the solution are limited; key fields; validation checks and data capture forms. User requirements have been identified with details of most input, output and processing included. The front end user interface, forms, reports (grouping, sorting), queries (simple) have been designed to an acceptable standard.

[3]–[4]

The candidate has designed a database with limited or no use of appropriate fields. User requirements have not been clearly identified, with limited reference to input, output and processing.

[1]–[2]


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2 (a) Building the multimedia solution MarksThe candidate has produced a high quality multimedia solution which is highly suitable for the target audience. The solution makes effective use of: templates, hypertext, optimised media, appropriate sound original video, original animation. Scripted elements aid the interactivity of the solution. A range of accessibility elements are available.

[11]–[13]

The candidate has produced a good quality multimedia solution which is suitable for the target audience. The solution makes use of: templates, hypertext, optimised media, sound, original video or animation. Scripted elements have been used. An accessibility element is available.

[7]–[10]

The candidate has produced a good quality multimedia solution which is suitable for the target audience. The solution makes use of: templates, hypertext, optimised media, sound, original video or animation.

[4]–[6]

The candidate has produced a basic quality multimedia solution. The solution makes use of: templates, hypertext, optimised media, video or animation and sound.

[1]–[3]


2 (b) Building the database solution MarksThe candidate has produced an excellent database solution which is highly suitable for the target audience. Tables are linked with appropriate relationships, have appropriate validation, lookup lists and input masks. Forms and navigation are user friendly and intuitive. Complex queries using two or more criteria and logical operators have been implemented. Reports incorporate the use of grouping, sorting, calculations and headers/footers.

[11]–[14]

The candidate has produced a very good database solution which is suitable for the target audience. Tables are linked, have appropriate validation, lookup lists and input masks. Forms and navigation are user friendly and intuitive. Queries using two or more criteria and logical operators have been implemented. Reports incorporate the use of grouping, sorting and headers/footers.

[7]–[10]

The candidate has produced a good database solution which is suitable for the target audience. Tables have appropriate validation, lookup lists and input masks. Forms and navigation are logical. Queries using criteria and/or logical operators have been implemented. Reports incorporate the use headers/footers.

[4]–[6]

The candidate has produced a basic database solution. Tables have some validation, lookup lists and/or input masks. Forms, navigation, basic queries and reports have been attempted.

[1]–[3]


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3 Testing the database solution MarksThe candidate has successfully designed a detailed test plan derived from user requirements. The test plan is well structured in tabular format and incorporates a range of tests. Testing data includes valid, invalid and extreme data. Errors are clearly identified and testing reflects the general robustness of the system.

[8]–[10]

The candidate has successfully designed a test plan derived from user requirements. The test plan is structured in tabular format and incorporates a range of tests. Testing data includes valid, invalid and/or extreme data. Errors are identified and testing reflects the general robustness of the system.

[4]–[7]

The candidate has successfully designed a partial test plan. The test plan has some structured in tabular format. Testing data includes valid and invalid data.

[1]–[3]


Testing of the multimedia solution is NOT required.

4 Evaluating the multimedia and database solution MarksThe candidate has produced a well-structured evaluation of both solutions with clear reflection on the extent to which the user requirements have been met. Performance and robustness issues have been included. Refinements are clearly identified.

[8]–[10]

The candidate has produced a good evaluation of both solutions with reflection on the extent to which the user requirements have been met. Performance/robustness issues have been included. Some refinements are identified.

[4]–[7]

The candidate has produced an evaluation of the database or multimedia solution with limited reflection on the extent to which user requirements have been met. No performance/robustness issues have been included. No refinements are identified.

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Digital Development Concepts

[CODE]SPECIMEN



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1 (a) C Examining variables within the program and checking their values for errors [1]

(b) D A value that can be assigned but remains the same throughout the program [1]

(c) D Converts the program code to binary format [1]

2 A program design solution can be developed using algorithms [1]. The designs are converted into sets of instructions for computers called programs [1]. Locations in memory called variables [1] are used to hold any data being processed.

3 (a) Level 0 [0] Answer is not worthy of credit.

Level 1 ([1]) The candidate refers to one of the areas in context. The candidate

makes limited use of spelling, punctuation and grammar. The meaning of the text is not always clear. The candidate displays a limited form and style appropriate to the question. The organisation of the answer is limited.

Level 2 ([2]–[3]) The candidate refers to both areas in context. The candidate makes

satisfactory use of spelling, punctuation and grammar. The meaning of the text is usually clear. The candidate demonstrates a satisfactory form and style appropriate to the question. The organisation of the answer is satisfactory.

Level 3 ([4]) The candidate describes fully the two headings in context. The

candidate makes good use of spelling, punctuation and grammar. The meaning of the text is always clear. The candidate demonstrates a good form and style appropriate to the question. The organisation of the answer is good.


Abstraction• Involves removing specific detail and focussing on general

characteristics• Involves creating a model/modelling the problem to be solved• Involves the filtering out of characteristics that are not required• One short relevant example of abstraction

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Decomposition• Involves breaking larger/complex problems into smaller problems• Smaller problems are easier to understand/large problems are

difficult to understand• Solutions to smaller problems can be designed independently• Solutions to smaller problems can be brought together to form

one solution• One short relevant example of decomposition [4]

(b) (i) Variable Data TypepercentageCommission Integer [1]valueOfSales Real/Double/Float [1]

[2]

(ii) Correct structure chosen, IF-Statement[1]

If valuesOfSales >=1 and valueOfSales<=999 [1] percentageCommission=0.01 [1] commission= percentageCommission * valueOfSales [1]

elseIf valuesOfSales >=1000 and valueOfSales<=1999 [1] percentageCommission=0.05 commission = percentageCommission * valueOfSales

elseIf valuesOfSales >=2000 [1] percentageCommission=0.1 commission = percentageCommission * valueOfSales

Allocate mark once only for assigning a value to percentageCommission Allocate mark once only for calculating commission [6]

(iii) Black Box Testing Any two from:• Ensuring that valid inputs are accepted/ invalid inputs rejected• Ensuring that a correct output is returned• The internal methods of the system are never known to the tester• Ensures that modules work well at system level [2]

White Box Testing Any two from:• The internal components of a system are tested• The program code and logic is trialled using test data• Programming skills are required to test the objects that make up

an application [2]

Unit Testing Any two from:• Units sections or modules of code [1] are tested independently [1]• Each module will have its own test plan [1] [2]


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(iv) valueOfSalesAny three acceptable data values [3]Eg

Reason for TestAny three acceptable validation checks [3]Eg

Expected OutcomeAny three suitable and corresponding error messages [3]Eg

Enter key Null data (Presence check)

Error message

1 Extreme value Data accepted-200 Outside of range

(Range Check)Error message

12w Type Check Error message999 Extreme Value Data accepted224 Valid data Data accepted

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4 (a) Level 0 [0] Answer is not worthy of credit.

Level 1 ([1]–[2]) The candidate names one, two or three validation checks in context. The candidate makes limited use of spelling, punctuation and grammar. The meaning of the text is not always clear. The candidate displays a limited form and style appropriate to the question. The organisation of the answer is limited.

Level 2 ([3]–[4]) The candidate describes two or three validation checks in context. The candidate makes satisfactory use of spelling, punctuation and grammar. The meaning of the text is usually clear. The candidate demonstrates a satisfactory form and style appropriate to the question. The organisation of the answer is satisfactory.

Level 3 ([5]–[6]) The candidate describes fully three validation checks in context. The candidate makes good use of spelling, punctuation and grammar. The meaning of the text is always clear. The candidate demonstrates a good form and style appropriate to the question. The organisation of the answer is good.

Answers may include a suitable validation check with associated explanation and example such as:

• Range – to ensure data entered is within an acceptable range for example percentages should be entered in the range 1-100.

• Type – to ensure the data entered is of the correct data type for example percentages should be numeric whereas names would be of type string.

• Format – to ensure that data follows a particular pattern/layout for example, a postcode must have 2 letters, 2 numbers, a space(optional), 1 number, 2 letters.

• Presence – to check that data has been entered. For example, when completing an online form a presence check may be entered to ensure that data has been entered into the email field.

• Length – to ensure that data entered does not exceed a particular number of characters in length/is at least a certain number of characters in length. For example, a length check could be used to ensure that a password is at least 8 characters long. [6]


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(b) Sample C# do

{ okFlag = true; [1] flag assignment

Console.Write(“Enter Dish Type in the range 1-5 \t”); dishType = Convert.ToInt32(Console.ReadLine());

if ((dishType < 1) || (dishType > 5)) [1] for if condition {

Console.WriteLine(“Error - out of range”); okFlag = false; [1] for flag re-assignment

} } while (okFlag == false); [1] loop condition [4]

(c) (i) Any two from (note any valid string function is acceptable with a valid explanation for 2 marks):

CompareTo() Compare two strings and returns integer value as output. It returns 0 for true and 1 for false.

Contains() Checks whether specified character or string is exists or not in the string value.

EndsWith() Checks whether specified character is the last character of string or not.

Equals() Compares two string and returns Boolean value as output.

IndexOf() Returns the index position of first occurrence of specified character.

ToLower() Converts String into lower case based on rules of the current culture.

ToUpper() Converts String into Upper case based on rules of the current culture.

Insert() Insert the string or character in the string at the specified position.

Length Returns length of string.Remove() Deletes all the characters from beginning to

specified index position.Replace() This method replaces the character.Split() Splits the string based on specified value.StartsWith() Checks whether the first character of string is

same as specified character.Substring() Returns substring.Trim() Removes extra whitespaces from beginning and

ending of string. [4]


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(ii) Any two from:

Use the Length function [1] /Use a condition [1] (name.Length>=6 [1] and name.Length<=30 [1])

[2]

5 (a) Tick ()

A) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20B) 0 3 6 9 12 15 18 21C) 3 6 9 12 15 18D) 0 3 6 9 12 15 18

E) 3 6 9 12 15 18 21 [1]

(b) (i) B- This is the second statement [1] (ii) C- This is the third statement [1]

6 (a) int[] pounds = new int [10]

correct array size [1] correct data type [1] correct name for array [1]

[3]

(b) for (k = 0; k<10; k++)

pounds[k] = 0;

Use of for loop [1] Correct upper and lower bounds [1] Correct assignment statement [1] [3]

(c) Algorithm acceptable (Marker instruction: upperbound = 10, lowerbound = 1 OR

upperbound = 9, lowerbound = 0)

SET COUNTER = 0 DECLARE ARRAY POUNDS FOR COUNTER = lowerbound TO upperbound [1] GET POUNDSVALUE [1] POUNDS [COUNTER] = POUNDSVALUE [1] END FOR

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or

SET COUNTER = 0 DECLARE ARRAY POUNDS WHILE COUNTER < upperbound [1] GET POUNDSVALUE [1] POUNDS [COUNTER] = POUNDSVALUE [1] COUNTER = COUNTER +1 END WHILE OR DO......WHILE also acceptable [1]

or

c# code

for (k = 0; k<10; k++) [1] { pounds[k] [1] = Convert.ToInt32(Console.ReadLine()); [1] } [3] 9


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7 (a) OperationsPerforming a series of operations one after the other.

Sequence Selection Iteration[1]

The calculation of an employee’s tax payment depends on their salary level.


[1]The program will continue to add the cost of a basket of items until the basket is empty.


[1] [3]

(b) (i) Global variable: a variable which can be seen/used/accessed anywhere within an application/program [1] [1]

(ii) Local variable: a variable whose scope is limited [1] to a particular module/method within an application [1] [2]


• A class serves as a template/blueprint for creating an object• Each object is created[instantiated] from a single class • Each class can instantiate many objects [2]

(ii) An object is an instance of a class [1] with variables, functions and data structures [1] [2]

(d) Any four from:

• Auto completion of statements [1] suitable explanation [1]• Syntax checks with colour coding[1] suitable explanation [1]• Bracket matching [1] suitable explanation [1] [4]

8 (a) A list of characters recognised by the computer hardware and software and represented by a number. [1]

(b) ASCII uses the numbers 0 through 127 [1] to represent all English characters [and special control characters] [1]

Each letter is assigned a number [1]/for example ‘A’ is 65. [3]

(c) Unicode consists of more than 109000 characters ASCII consists of 128 [1] Unicode uses 8, 16 or 32 bit characters based on different presentations while ASCII is a seven-bit encoding formula [1] [2]

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9 (a) (i) 36/2 = 18 r 0 18/2= 9 r 0 9/2= 4 r 1 4/2 = 2 r 0 2/2 = 1 r 0 1/2 = 0 r 1

Calculation [1] Answer in six bits 100100 / using 8 bits 00100100 Accurate answer [1]

or

use column base 2 solution[1] and check answer[1]:

128 64 32 16 8 4 2 10 0 1 0 0 1 0 0

(1x32) + (1x4) = 36 [2]

(ii) 22/16 = 1 r 6 1/16 = 0 r 1 Answer 16 hex

Calculation [1] Accurate answer [1] Mention base hexadecimal [1]

or

Use column base 16 solution [2] and check answer [1]: 16 1 1 6 (1x16) + (6x1)=22 [3]

(iii) Used to simplify how binary is represented [1] For example the binary number 11010100 would be D4 in hex/

suitable example [1]. [2] (b) (i)

0 1 1 0 0 0 1 0+ 1 1 0 1 0 1 0 0(1) 0 0 1 1 0 1 1 0

Accurate calculation [1]

Overflow [1] [2] (ii) Any two from:

An 8-bit overflow error will occur [1] The overflow digit will be dropped as it cannot be stored [1] The result of the calculation will be stored incorrectly [1] [2]


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(c) OR Gate

A B X0 0 00 1 1 [1]1 0 1 [1]1 1 1

AND GateA B X0 0 00 1 0 [1]1 0 0 [1]1 1 1

[4]

10 (a) (i) Name Bubble Sort [1] Insertion Sort [1]LoopMax 2 marks

Uses two nested for loops [1]or The outer loop runs n times (number of elements in array), and the inner loop runs n/2 times [2]orReference to how the loop is used to process the elements:Bubble sort repetitively compares adjacent pairs of elements and swaps if necessary [2]

Uses two nested for loops. [1] orThe outer loop runs n times (number of elements in array), and the inner loop runs n/2 times [2]or Reference to how the loop is used to process the elements:Insertion sort maintains a sorted sub-array, and repetitively inserts new elements into it. Using two loops [2]

EfficiencyMax2 marks

Two from: Bubble sort will carry out a set number of comparisons [1] and is useful for small sets of data [1]Passes through the array a number of times [1]

Two from: Insertion sorts only pass through the array only once [1]It is adaptive [1] efficient for data sets that are already partly/substantially sorted [1]

[5] (ii) If (studentHeight[i] > studentHeight[i+1])

or If (StudentHeight[i-1] > temp)

Correct condition [1] Correct array element index [1] [2]

15


AVAILABLE MARKS

120

(iii) studentHeight (Bubble Sort)

155 152 156 151 153

Pass 1152 155 151 153 156

[1] Pass 2

152 151 153 155 156

[1] Pass 3

151 152 153 155 156

[1] Pass 4 : as pass 3 [1] Pass 5 : as pass 3 [1] [5]

or

studentHeight (Insertion Sort)

155 152 156 151 153

Pass 1152 155 156 151 153

[1] Pass 2

152 155 156 151 153

[1] Pass 3

152 155 156 151 153

[1] Pass 4

151 152 155 156 153

[1] Pass 5

151 152 153 155 156

[1] [5]


AVAILABLE MARKS

121

(b) Any three from:

• Binary Search [1] is applied to a sorted list [1]• The search value is compared with elements in the middle

position of the array [1]• If the value is less than the middle element, then it must lie in the

lower half of the array and if it’s greater than the element then it must lie in the upper half of the array [1]

• Binary Search is useful when there are large numbers of elements in an array as the number of comparisons is reduced [1] [3]

11 (a) (i) A named module/section of code written by the user [1] It may have parameters [1] It will have a return value [1] [3]

(ii) [private] double findAverage (int num1, int num2, int num3) {

double myaverage=0.0; myaverage=(num1+num2+num3)/3; return myAverage; }

Any three from:

• Function heading parameters• Function heading return type• Return statement• Calculation of average• Declaration of double/real/float variable inside function [3]

(iii) [private] int findProduct (int num1, int num2, int num3) {

int myProduct=0; myProduct=(num1*num2*num3); return myProduct; }

Any three from:

• Function heading parameters• Function heading return type• Return statement• Calculation of product• Declaration of double/real/float variable inside function [3]

Total

15

9

120


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MARKSCHEME

Digital TechnologyUnit 5

Digital Development Practice

[CODE]SPECIMEN



124

1 Design a solution using appropriate tools MarksThe candidate has successfully designed a high quality programming solution, using appropriate design tools, e.g. flowchart, pseudo code etc. to produce a fully decomposed solution. A comprehensive set of data requirements (inputs, processes, outputs, interface and report design) have been developed for the proposed solution. The data requirements show enough detail to enable a fully functioning programme to be developed. Target audience needs have been clearly identified. Full consideration has been given to appropriate help for the user of the system.Validation and error trapping techniques are designed to ensure that the candidate produces a robust program. The use of user feedback to refine the solution based on the issues identified during the design process is evident.

[10]–[13]

The candidate has developed a clear set of data requirements for the proposed solution.The candidate has successfully designed a basic solution, using some design tools (e.g. data flow diagrams, pseudo code etc.) to produce a working solution. A basic set of data requirements (inputs, processes, outputs, interface and report design) have been developed for the proposed solution. The data requirements show enough detail to enable a basic functioning programme to be developed. Target audience needs have been identified. Some evidence of validation is included in the design to ensure that the candidate produces a robust program. Some evidence of design refinement based on the issues identified during the design process are produced.

[5]–[9]

The candidate has designed a limited programming solution. A limited set of data requirements have been developed for the proposed solution.The data requirements show enough detail to enable a partially functioning programme to be developed. Little evidence of validation is included in the design solution.Target audience poorly identified and little or no evidence of design refinement.

[1]–[4]



125

2 Building a solution MarksThe candidate has produced a high quality solution to the proposed problem.The solution has used appropriate features of the integrated development environment to support the creation of the program.The interface is appropriate for the target audience and matches all data and design requirements. An annotated solution is evident showing the use of appropriate data types, data structures, control structures, string handling, functions, logical and arithmetic operators.Validation and help features are evident throughout solution.

[21]–[27]

The candidate has produced a fully working solution to the proposed problem.The solution used some of the features of the integrated development environment to support the creation of the solution.The interface is appropriate for the target audience and matches most of the data and design requirements. An annotated solution is produced, showing the use of data types, data structures, control structures, string handling, functions, logical and arithmetic operators.Basic validation and help features are evident in the solution.

[14]–[20]

The candidate has produced a basic working solution to the proposed problem.The solution uses a few of the features of the integrated development environment to support the creation of the solution.The target audience has been considered when designing the interface and matches most of the data and design requirements. Some evidence of a working solution was produced, showing some of the following: data types, data structures, control structures, string handling, logical and arithmetic operators and functions.Little evidence of validation and/or help features in the solution.

[7]–[13]

The candidate has produced a partially working solution to the proposed problem.Some evidence of the integrated development environment was used in the creation of the solution.Some evidence of a solution is produced, showing the use of the features required to develop a solution.

[1]–[6]



126

3 Testing the solution MarksThe candidate has demonstrated an excellent application of the knowledge and skills required to fully test the solution.Detailed evidence of a successfully designed test plan derived from user requirements was produced. The test plan is well structured, in tabular format (showing tests, expected outcome, actual outcome and fixes). Incorporates a range of tests (black and white box testing) and includes valid, invalid and extreme test data. Errors are clearly identified and a working solution developed. Testing reflects the general robustness of the system.

[8]–[10]

The candidate has demonstrated a good application of the knowledge and skills required to test the solution.Evidence of a successfully designed test plan derived from user requirements is produced. The test plan is structured in tabular format (showing tests, expected outcome, actual outcome and some fixes) and incorporates a range of tests (black and white box testing). Test data includes valid, invalid and extreme data. Errors are identified and solution is offered.

[4]–[7]

The candidate has successfully designed a partial test plan. The test plan has some tabular format structure. Testing data includes valid and invalid data. [1]–[3]



127

4 Evaluating the solution MarksThe candidate has produced a well-structured evaluation of the solution with clear reflection on the extent to which the user requirements have been met. The test data is fully analysed. Refinements are clearly identified. The performance and robustness of the system is analysed fully.

[8]–[10]

The candidate has produced a good evaluation of the solution with some reflection on the extent to which the user requirements have been met. Performance of the test data is analysed. Some evidence that refinements are identified. The performance and robustness issues are included in the evaluation.

[4]–[7]

The candidate has produced an evaluation of the solution with limited reflection on the extent to which user requirements have been met. Limited/no performance or robustness issues have been included. No refinements are identified.

[1]–[3]



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