Final Exam Java Fundamental

Test: Java Fundamentals Final ExamReview your answers, feedback, and question scores below. An asterisk (*) indicates a correct answer.

Section 4(Answer all questions in this section)

1.Which of the following is not a legal name for a variable?

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(1) Points

2bad (*)zerotheLastValueButONeyear2000

Correct

2.Select the declaration and initialization statement that will hold the letter J.

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(1) Points

int letter='J';float letter='J';String letter='J';char letter='J'; (*)

Correct

3.A _______________ is used to organize Java related files.

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(1) Points

ProjectWorkspace

Package (*)Collection

Correct

4.A combination of views and editors are referredto as _______________.

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(1) Points

A workspaceA physical locationA perspective (*)All of the above

Correct

5.A workspace is: Mark for

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The physical location onto which you will store and save your files.The location where all projects are developed and modified.The location where you can have one or more stored perspectives.All of the above. (*)

Correct


6.Eclipse does not provide views to help you navigate a hierarchy of information. True or False?

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(1) Points

TrueFalse (*)

Correct

7.Multiple windows are used when more than one file is open in the edit area. True or False?

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(1) Points

TrueFalse (*)

Correct

8.Given the code:

String s = new String("abc");

Which of the following statements will change the length of s to the largest length?

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(1) Points

s.trim()s.replace("a", "aa")s.substring(2)s.toUpperCase()None of the above will change the length ofs. (*)

Correct

9.The == operator tests if two String referencesare pointing to the same String object. True or false?

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(1) Points

True (*)False

Correct

10.Which of the following creates a String reference named s and instantiates it?

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(1) Points

(Choose all correct answers)

String s=""; (*)s="s";String s;String s=new String("s"); (*)

Correct


11.Which of the following creates a String named Char?

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(1) Points

char string;String Char; (*)char Char;char char;String char;

Correct

12.The following code is an example of creating aString reference:

String s;

True or false?

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(1) Points

True (*)

False

Correct

13.The following defines an import keyword: Mark for

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Defines where this class lives relative to other classes, and provides a level of access control.Provides the compiler information that identifies outside classes used within the current class. (*)Precedes the name of the class.

Correct

14.Which of the following defines a driver class? Mark for

Review (1) Points

Contains a main method and other static methods. (*)Contains classes that define objects.Contains a main method, a package, static methods, and classes that define objects.None of the above.

Correct


15.A counter used in a for loop cannot be initialized within the For loop header. True or false?

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(1) Points

TrueFalse (*)

Correct


16.Which of the following best describes a while loop?

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A loop that contains a segment of code thatis executed before the conditional statement is tested.A loop that executes the code at least one time even if the conditional statement is false.A loop that is executed repeatedly until the conditional statement is false. (*)A loop that contains a counter in parenthesis with the conditional statement.

Correct

17.In a for loop the counter is not automaticallyincremented after each loop iteration. Code must be written to increment the counter. Trueor false?

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(1) Points

True (*)False

Correct

18.switch statements work on all input types including, but not limited to, int, char, and

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String. True or false? (1) Points

TrueFalse (*)

Correct

19.Determine whether this boolean expression evaluates to true or false:

!(3<4&&6>6||6<=6&&7-2==6)

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(1) Points

True (*)False

Correct

20.The three logic operators in Java are: Mark for

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&&, ||, ! (*)!=,=,==&&,!=,=&,|,=

Correct


21.

What is the output of the following segment of code?

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(1) Points

32111111 (*)1111111This code doesn't compile.

Incorrect. Refer to Section 6 Lesson 1.

22.

Which of the following declares and initializes aone dimensional array named values of size 5 so that all entries contain 1?

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(1) Points

int[] values={1,1,1,1,1}; (*)int[] values={1};int values={1,1,1,1,1};int values[]={1,1,1,1,1,1};


23.

The following segment of code initializes a 2 dimensional array of primitive data types. True or false?

double[][] a=new double[4][5];

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(1) Points

True (*)False

Correct

24Which of the following statements adds 5 to everyelement of the one dimensional array prices and

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.then prints it to the screen? (1) Points

for(int i=0;i<prices.length;i++) System.out.println(prices[i]+5); (*)System.out.println(prices[i]+5);for(int i=1;i<prices.length;i++) System.out.println(prices[i]+5);for(int i=0;i<prices.length;i++) System.out.println(prices[1]+5);


25.

Which searching algorithm involves using a low, middle, and high index value to find the locationof a value in a sorted set of data (if it exists)?

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(1) Points

Sequential SearchMerge SortSelection SortBinary Search (*)All of the above

Correct


26.A sequntial search is an iteration through thearray that stops at the index where the desired element is found. True or false?

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(1) Points

True (*)False

Correct

27.Bubble Sort is a sorting algorithm that involves swapping the smallest value into the first index, finding the next smallest value and swapping it into the next index and so on until the array is sorted. True or false?

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(1) Points

TrueFalse (*)

Correct

28.Which of the following is a sorting algorithm that involves repeatedly incrementing through the array and swapping 2 adjacent values if they are in the wrong order until all elementsare in the correct order?

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(1) Points

Selection SortMerge SortBubble Sort (*)Sequential SearchBinary Search

Correct

29.If an exception is thrown by a method, where can the catch for the exception be?

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(1) Points

There does not need to be a catch in this situation.The catch must be in the method that threw the exception.The catch can be in the method that threw the exception or in any other method that called the method that threw the exception.(*)The catch must be immediately after the throw.

Correct


30.All objects, in Java, are created using int. True or false?

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(1) Points

TrueFalse (*)

Correct


31.

The basic unit of encapsulation in Java is the primitive data type. True or false?

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(1) Points

TrueFalse (*)


32.

Which of the following calls the method calculatecorrectly?

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(1) Points

ThisClass t=new ThisClass(); int x=t.calculate(3,4); (*)int x=calculate(3,4);ThisClass t=new ThisClass(); int x=t.calculate(3);ThisClass t=new ThisClass(); int x=t.calculate();

Correct

33.

Which of the following creates an instance of theclass below?

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(1) Points

ThisClass t=new ThisClass();ThisClass t;ThisClass t=new ThisClass(3,4);ThisClass t=new ThisClass(5); (*)

Correct

34.

Identify the driver class that correctly initializes employees Jane and Brandon. The Employee class is below.

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(1) Points

public class Employee {private String name; private int age; private double salary;public Employee(String n, int a, double s) {name = n; age = a; salary = s; }//methods for this class would go here}

public class driver_class {public static void main(String[] args) {Employee Jane = new Employee("Jane", 48, 35.00);Employee Brandon = new Employee("Brandon", 36,20.00); }} (*)public class driver_class {public static void main(String[] args) {Employee("Jane", 48, 35.00);Employee("Brandon", 36, 20.00); }}public class driver_class {public Employee{Jane = new Employee("Jane", 48, 35.00);Brandon = new Employee("Brandon", 36, 20.00); }}public class Employee {public class driver-class{Employee Jane = new Employee();Employee Brandon = new Employee(); }}

Correct

35.

What operator do you use to call an object's constructor method and create a new object?

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(1) Points

+new (*)instanceOf

Correct


36.If you inherit a class, you do not inherit theclass' constructors. True or false?

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(1) Points

True (*)False

Correct

37.If a variable in a superclass is private, could it be directly accessed or modified by asubclass? Why or why not?

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(1) Points

Yes. A subclass inherits full access to allcontents of its super class.Yes. Any variable passed through inheritance can be changed, but private methods cannot.No. A private variable can only be modifiedby the same class with which it is declaredregardless of its inheritance. (*)No. Nothing inherited by the super class

can be changed in the subclass.

Correct

38.What is encapsulation? Mark for

Review (1) Points

A keyword that allows or restricts access to data and methods.A programming philosophy that promotes simpler, more efficient coding by using exiting code for new applications.A structure that categorizes and organizes relationships among ideas, concepts of things with the most general at the top andthe most specific at the bottom.A programming philosophy that promotes protecting data and hiding implementation in order to preserve the integrity of data and methods. (*)

Correct

39.Which of the following show the correct UML representation of the super class Planet and its subclass Earth?

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(1) Points

(*)

None of the above.

Correct

40.Static classes can't return instances of the parent class when the parent class uses a private constructor. True or false?

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(1) Points

TrueFalse (*)



41.Public static variables can't have their valuereset by other classes. True or false?

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(1) Points

TrueFalse (*)

Correct

42.A base case can handle nested conditions. Trueor false?

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(1) Points

True (*)False

Correct

43.What is Polymorphism? Mark for

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A way of redefining methods with the same return type and parameters.A way to create multiple methods with the same name but different parameters.A class that cannot be initiated.The concept that a variable or reference can hold multiple types of objects. (*)

Correct

44.Abstract classes can be instantiated. True or false?

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(1) Points

TrueFalse (*)

Correct

45.If an abstract class does not have implementedconstructors or methods, it should be implemented as an interface instead. True or false?

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(1) Points

True (*)

False

Correct


46.Which segment of code correctly defines a method that contains two objects of class Treeas parameters?

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(1) Points

void bloom(Tree pine, Tree oak) {//code here }; (*)Tree bloom (pine, oak) {//code here };void bloom, Tree pine, Tree oak {//code here };None of the above, objects cannot be passedas parameters.


47.Which of the following is the correct way to code a method with a return type an object Automobile?

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Automobile upgrade(String carA){ carA="Turbo"; return carA;}Automobile upgrade(Automobile carA){ carA.setTurbo("yes"); return carA;} (*)String upgrade(String carA){ carA="Turbo"; return carA;}upgrade(Automobile carA) Automobile{ carA.setTurbo("yes"); return carA;}None of the above. It is not possible to

return an object.

Correct

48.Which segment of code represents a correct wayto define a variable argument method?

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(1) Points

String easyArray(String ... elems) {//code}(*)String easyArray(... String elems) {//code}String ... easyArray(String elems) {//code}Integer easyArray ... (int elems) {//code}

Correct

49.It is possible to return an object from a method. True or false?

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(1) Points

True (*)False

Correct

50.Which segment of code represents a correct wayto call a variable argument method counter that takes in integers as its variable argument parameter?

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(1) Points

counter(String a, int b);counter(int[] numbers);counter(1, 5, 8, 17, 11000005); (*)counter("one","two",String[] nums);

Correct

Final Exam Java Fundamental

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