Question text A(n) ____ is a method of a class that is automatically executed wh

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Question text

A(n) ____ is a method of a class that is automatically executed when an object of the class is created.

Select one:

a. package

b. interface

c. constructor

d. inheritance

Question 2

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If Shape is a class and you create a new class Rectangle that extends Shape, then Shape is a(n) ____ and Rectangle is a(n) ____.

Which word goes in the first blank in the sentence above?

Select one:

a. superclass

b. inherited class

c. subclass

d. package

Question 3

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If Shape is a class and you create a new class Rectangle that extends Shape, then Shape is a(n) ____ and Rectangle is a(n) ____.

Which word goes in the second blank of the sentence above?

Select one:

a. method

b. package

c. superclass

d. subclass

Question 4

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The Java class that you use to create windows is ____.

Select one:

a. JFrame

b. JButton

c. JTextField

d. JLabel

Question 5

Select one:

a. Show output

b. Get input and show results

c. Display a prompt to the user

d. Get input

Question 6

To create a window, which of the following classes has to be extended?

Select one:

a. JTextField

b. Container

c. JFrame

d. JButton

Question 7

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To display a window, you must invoke the method ____.

Select one:

a. displayWindow

b. setVisible

c. setDisplay

d. show

Question text

What is the name for Java classes that are provided so that values of primitive data types can be treated as objects?

Select one:

a. wrappers

b. extensions

c. event handlers

d. interfaces

Question 9

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Which class is part of the package java.awt?

Select one:

a. JButton

b. Container

c. JOptionPane

d. JFrame

Question 10

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Which method contains the code that the program executes when a specific event is generated?

Select one:

a. GUIListener

b. actionPerformed

c. windowListener

d. buttonListener

Question 11

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Which method is used to register a listener object to a button object?

Select one:

a. registerButton

b. eventButton

c. addActionListener

d. buttonListener

Question 12

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Which modifier is used to build classes on top of classes that are interfaces?

Select one:

a. public

b. new

c. implements

d. private

Question 13

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Select one:

a. Perimeter

b. Exit

c. Calculate

d. Both Calculate and Exit

Question 14

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Which of the following is a reserved word in Java?

Select one:

a. inheritance

b. pane

c. event

d. extends

Question 15

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Which of the following is not a method of the class JTextField?

Select one:

a. setVisible

b. setEditable

c. setText

d. addActionListener

Question 16

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Which of the following is NOT a required attribute of a window?

Select one:

a. color

b. title

c. height

d. width

Question 17

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Which of the following is NOT found within the content pane?

Select one:

a. buttons

b. title bar

c. labels

d. text areas

Question 18

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Which of the following methods is NOT part of the class JFrame?

Select one:

a. getText

b. setTitle

c. setSize

d. setVisible

Question 19

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Which of the following sets the window width to 100 pixels and the height to 200 pixels?

Select one:

a. setSize(200, 100);

b. set(200, 100);

c. setDims(100, 200);

d. setSize(100, 200);

Question 20

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Which of the following statements is NOT true about GUI programs?

Select one:

a. Every window has a title, width, and height.

b. A layout must be created before components can be added to a content pane.

c. All components are added directly to the GUI window.

d. Every GUI program requires a window.

Question 21

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Which package will you most likely have to import in order to write a GUI program?

Select one:

a. java.awt.*

b. java.text.*

c. java.net.*

d. java.io.*

Question 22

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Write a program that takes as input the pay rate and hours worked of an employee and calculates the pay of the employee.

Based on the problem statement above, which of the following would most likely be chosen as the class?

Select one:

a. Pay_Rate

b. Pay

c. Employee

d. Hours_Worked

Question 23

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Write a program that takes as input the pay rate and hours worked of an employee and calculates the pay of the employee.

Based on the problem statement above, which of the following would be a data member?

Select one:

a. pay

b. hoursWorked

c. employee

d. job

Question 24

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Write a program to input the radius of the base and height of a cylinder, and calculate and print the surface area, volume, and area of the base of the cylinder.

According to the problem statement above, which of the following would be a data member?

Select one:

a. Input

b. Radius of the base

c. Surface area

d. Volume

Question 25

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Write a program to input the radius of the base and height of a cylinder, and calculate and print the surface area, volume, and area of the base of the cylinder.

Which words from the problem statement above could we use to determine the operations for this program?

Select one:

a. cylinder, program, volume

b. input, calculate, print

c. radius, cylinder, print

d. height, cylinder, radius

Question 26

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An interface is a class that contains only the method headings and each method heading is terminated with a semicolon.

Select one:

True

False

Question 27

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Every window has a title, width, and height.

Select one:

True

False

Question 28

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Given the declaration,

Integer num;   

The statement num = 8; is known as autoboxing of int type.

Select one:

True

False

Question 29

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Given the declaration,

Integer x;   

After executing either of the following two statements, x points to an Integer object with value 8:

x = 8;

x = new Integer(8);

Select one:

True

False

Question 30

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GUI components are placed in a window called JFrame.

Select one:

True

False

Question 31

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If lengthTF is a JTextField and pane is a container, then the statement pane.add(lengthTF); adds the text field to the content pane of a window.

Select one:

True

False

Question 32

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In Java, data members are also known as fields.

Select one:

True

False

Question 33

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In Java, extends is a reserved word.

Select one:

True

False

Question 34

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In Java, there is one way to make an application program create a window.

Select one:

True

False

Question 35

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In object-oriented design, the nouns found in the problem specification can be used to select the operations in the program.

Select one:

True

False

Question 36

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In object-oriented design, the verbs in the problem specification can be used to identify the objects in the program.

Select one:

True

False

Question 37

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JTextFields are used to get input, but not show output.

Select one:

True

False

Question 38

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The class ActionListener contains only one method, actionEvent.

Select one:

True

False

Question 39

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The class Container is included in the package java.awt.

Select one:

True

False

Question 40

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The class JFrame contains the method setSize.

Select one:

True

False

Question 41

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The first step in solving a problem using object-oriented design is to identify objects.

Select one:

True

False

Question 42

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The GridLayout manager arranges GUI components in a list formation.

Select one:

True

False

Question 43

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The height and width of a window are measured in inches.

Select one:

True

False

Question 44

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The method addWindowListener is included in the class JFrame.

Select one:

True

False

Question 45

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The method getContentPane of the class JFrame is used to access the content pane of the window.

Select one:

True

False

Question 46

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To compare the values of two Integer objects for equality, we can use the method equals of the class Integer.

Select one:

True

False

Question 47

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To determine whether two reference variables of the Integer type point to the same Integer object, we can use either the method equals of the class Integer or the operator ==.

Select one:

True

False

Question 48

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When you click a JButton, an event, known as an action event, is created.

Select one:

True

False

Question 49

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Whenever there is a superclass-subclass relationship, the superclass inherits all data members and methods of the subclass.

Select one:

True

False

Question 50

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Wrapper class objects are mutable.

Select one:

True

False

Explanation / Answer

I have answered Q1 to Q6.

Please repost others in separate post.

Q1.
   c. constructor
Q2.
   If Shape is a class and you create a new class Rectangle that extends Shape, then Shape is a(n) superclass and Rectangle is a(n) subclass
Q3.
   If Shape is a class and you create a new class Rectangle that extends Shape, then Shape is a(n) superclass and Rectangle is a(n) subclass

Q4.
   The Java class that you use to create windows is JFrame
Q5.
   Image not visible
Q6.
   To create a window, which of the following classes has to be extended?
   Ans: c. JFrame

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