SQL INTRODUCTION AND CONCEPTUAL MODELING ONE MARK DUMPS

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DBMS SKILL TEST UNIT - I

UNIT I (INTRODUCTION AND CONCEPTUAL MODELING)

1. __________________is a collection of interrelated data and a set of programs to access those data.

a) Database Management Systemsb) Databasec) Data storaged) Data systems

 Ans: (a)

2. The collection of data is sally referred to as ______________!contains informationrele"ant to an enterprise.

a) Data dictionaryb) Dis# space

c) Databased) $ntity

 Ans: (c)

%. The nonprocedral DM&s are also called as

a) Declarati"e DM&sb) 'rocedral DM&sc) Strctred DM&s

 Ans: (a)

. The disad"antage of file processing area) Data redndancyb) Data isolationc) ntegrity problemsd) All the abo"e

 Ans: (d)

*.____________schema describes the database design at the physical le"el.

a) 'hysicalb) &ogicalc) +oth

d) ,one of the abo"e  Ans: (a)

-.____________schema describes the database design at the logical le"el.

a) 'hysical

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DBMS SKILL TEST UNIT - I

b) &ogicalc) +othd) ,one of the abo"e

  Ans: (b)

. The schemas at the __________le"el are sometimes called as S/+ S0$MAS.

a) &ogicalb) 'hysicalc) ie3d) All the abo"e

  Ans: (c)

4. Application programs are said to e5hibit '6S0A& DATA D$'$,DA,0$ if they do notdependon the ___________________ 

a) &ogical schema

b) 'hysical schemac) ie3 schemad) ,one of the abo"e

  Ans: (b)

7._____________is a collection of conceptal tools for describing data! data relationships!data semantics and consistency constraints.

  a) Data baseb) Data modelc) Database langagesd) Data definition

  Ans:(b)

18.__________model ses a collection of tables to represent both data and relationships among the data.  a) 9elational

b) $ntity relationshipc) b;ect basedd) All the abo"e.

 Ans: (a)

11. The ____________model based on perception of real 3orld that consists of collection ofbasic ob;ects called entities and of relationships among these entities.

a) 9elationalb) $ntity relationshipc) b;ect basedd) Semi strctred data model

 Ans:(b)

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DBMS SKILL TEST UNIT - I

d) Data definition Ans: (b)

14. Doble ellipse indicates  a) Attribte

b) Mlti "aled attribte

c) Deri"ed attribted) Single "aled

 Ans: (b)

 17. <<<<<<<<<<<<<<<<<<<<<<<<<<<<<< enable an application programmer to constrct forms and reports

a) 9ADb) >ery processor c) Data Dictionaryd) +ffer 

 Ans: (a)

28. The =ery langage of S>& are________________ a) Declarati"eb) 'rocedralc) ,on procedrald) ,one of the abo"e.

  Ans:( c)

21. $ntity is represented by a set of ___________________.a) Tableb) 9elationc) Attribtesd) +oth a and c

 Ans: (c)

22._________________represent entity sets.

a) 9ectanglesb) 0irclesc) &inesd) Diamond

 Ans: (a)

2. _________________represent attribtes.

a) 9ectanglesb) 0irclesc) &inesd) $llipses

 Ans:(d)

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DBMS SKILL TEST UNIT - I

2*._________________represent sets of relationships among member from each ofse"eral entity types.

a) 9ectanglesb) 0irclesc) &ines

d) Diamond Ans: (d)

2-. The ________________model is based ob;ect oriented programming langage paradigm.a) b;ect oriented data model.b) Semi strctred data modelc) $9 modeld) 9elational model

 Ans:(a)

2. ________________ is a refinement process for relational databasea) >ery analysis.

b) Trncate processc) ,ormali?ationd) 9AD

 Ans:(c)

24._____________________model e5tends the traditional relational model

a) 9elationalb) $ntity relationshipc) b;ect relational datad) All the abo"e.

 Ans:(c)

27._________________model permits the specification of data 3here indi"idal data items ofthe same type may ha"e different sets of attribtes.

a) 9elationalb) $ntity relationshipc) b;ect relational datad) Semi strctred data model

 Ans:(d)

%8._________________interprets Data Definition &angage statements and records the

definitions in the data dictionary.

a) DD& complier b) DD& interpreter c) +oth a and b

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DBMS SKILL TEST UNIT - I

d) ,one of the abo"e  Ans: (b)

%1. _______________ sbsystem pro"ides the interface bet3een the lo3 le"el data storedin the database and the application programs and =eries sbmitted to the system.

a) >ery processor b) Storage manager c) ndicesd) Data dictionary

 Ans: (b)

%2. _______________ pro"ides a graphical means of modeling "arios components of asoft3are system.

a) TM&b) @M&

c) /M&d) SM&

  Ans: (c)

%%._______________manager allocates the space on dis# storage and the data strctressed to represent information stored on dis#.

a) +fferb) Bilec) Transactiond) Athorisation and integrity

  Ans: (b)

%.________________stores Meta data abot the strctre of the database in particlar theschema of the database.

a) Data storageb) Data dictionaryc) Databased) Data files

  Ans: (b)

%* .___________________is a collection of operations that perform a single logical fnctionin a database application.

a) +an#ingb) Transactionc) +oth a and b

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DBMS SKILL TEST UNIT - I

d) ,one  Ans: (b)

%-. n ______________ architectre the client machine does not contain any direct database calls.

a) T3o tier architectre

b) Three tier architectrec) +oth A and +d) ,one of the abo"e

  Ans:(b)

%. n _________________application is partitioned into components that reside at theclient machine.

a) T3o tier architectreb) Three tier architectrec) +oth A and +

d) ,one of the abo"e  Ans: (a)

%4. ________________manager is responsible or fetching the data from dis# storageinto main memory! and deciding 3hat data to cache in main memory.

a) +ffer Manager b) Bile Managerc) Transaction Manager d) Athori?ation and ntegrity Manager 

  Ans: (a)

%7. The phrase Cfor allC is indicated by

a) Select operationb) Di"ision perationc) /nion operationd) Set Difference operation

 Ans: (b)

8. hich of the follo3ing are not DD& statements.

a) 0reateb) /pdatec) Alter d) Drop

  Ans: (b)

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DBMS SKILL TEST UNIT - I

1._______________ is a statement re=esting the retrie"al of information.

a) >eryb) Select

c) Eoind) Eoin 3ith clase

  Ans: (a)

2. Data in a database can be

a) s integratedb) 0an be sharedc) 0an be concrrently accessedd) All the abo"e

 Ans: (d)

%. A person 3ho has sch central control o"er the system is called____________ 

a) D+Ab) ,aF"e /sersc) 'rogrammersd) /sers

 Ans: (a)

. The term __________refers loosely to the process of semi atomatically analy?ing  the large databases to find sefl patterns.

a) Databaseb) Data 3are hosingc) Data miningd) Data files

 Ans: (a)

*._________________can pro"ide fast access to data items.

a) Data filesb) Data bffer c) ndices

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DBMS SKILL TEST UNIT - I

d) $ntities Ans:(c)

-. The $ntity integrity constraint has

a) ,ot nll and chec#

b) 0hec# and nllc) 'rimary and foreignd) /ni=e

 Ans: (a)

. A G + (H) is an

a) &eft oter ;oinb) 9ight oter ;oinc) Bll oter ;oind) ter ;oin

  Ans: (a)

4._____________lin# attribtes to entity sets and entity sets to relationships.

a) 9ectanglesb) 0irclesc) &inesd) Diamond

 Ans:(c)

7. ierarchical data model can implement_____________ 

a) M:,b) 1:,c) +oth a and bd) ,one of the abo"e

  Ans: (b)

*8. ,et3or# database model can implement________________ 

a) M:,b) 1:,c) +oth a and b

d) ,one of the abo"e  Ans:(c)

*1. The ma;or disad"antage of both ,et3or# and ierarchial model is____________ 

a) 0annot implement M:,

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DBMS SKILL TEST UNIT - I

b) &ac# of strctre dependencyc) &ogical nderstandingd) All the abo"e

 Ans: (b)

*2._______________ is an abstraction throgh 3hich relationships are treated as higherle"el entities.

a) enerali?ationb) Aggregationc) Speciali?ationd) SA

  Ans: (b)

*%.An entity set that may not ha"e sfficient attribtes to form a primary #ey is termed as

a) ea# entity set

b) Discriminator c) 3ner entity setd) 'rime attribtes

 Ans: (a)

*. The attribtes that can be sbdi"ided into sbparts are termed as

a) 0omposite attribteb) Simple attribtec) Single "aled attribte

d) Mlti "aled attribte

  Ans: (b)

**._______________ e5press the nmber of entities to 3hich another entity can be associated "iaa relationship set

a) 0onstraintsb) Mapping cardinalitiesc) 0ardinalityd) +oth b and c

 Ans: (b)

*-. The ree# letter sigma indicatesa) Select operationb) 'ro;ect operation

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DBMS SKILL TEST UNIT - I

c) /nion operationd) Set Difference operation

 Ans: (a)

*. The ree# letter ' indicatesa) Select operation

b) 'ro;ect operationc) /nion operationd) Set Difference operation

 Ans: (b)

*4._______________ is an e5tension of the ;oin operation to deal 3ith missing "ales.a) $=i Eoinb) Self Eoinc) ter Eoind) ,on $=i Eoin

 Ans:(c)

*7. ( @ ) denotesa) 9ename perationb) 0artesian 'rodct perationc) ,atral Eoind) ter Eoin

 Ans: (b)

*7. _______________ retrns the nmber of elements in a relation

a) Distinctb) 0ont

c) Distinct 0ontd) All

 Ans: (b)

-8. hich of the follo3ing is not a grop fnction

a) Smb) A"eragec) ropd) Distinct

 Ans: (c)

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