Chapter 6 Quiz Review

Question 0

JLabels are used to get input and show output: (T/F)

Answer 0

False

Question 1

JFrame is a package: (T/F)

Answer 1

False

Question 2

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

Answer 2

Wrappers

Question 3

Which of the following is not a required attribute of a window:

Answer 3

Color

Question 4

Given the declaration:

Integer sum;

The statement num = 25; is known as auto boxing of the int type. (T/F)

Answer 4

True

Question 5

The method getContentPane of the class JFrame is used to access the content pane of the window: (T/F)

Answer 5

True

Question 6

An action event is handled by the class JFrame: (T/F)

Answer 6

False

Question 7

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

Answer 7

Implements

Question 8

If Shape is a class and you create a new class Circle that extends Shape, then shape is a _____ and circle is a _____ .

Which word goes in the first blank?

Answer 8

Superclass

Question 9

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

Answer 9

setVisible

Question 10

Every window has a title, width, and height

t/F

Answer 10

True

Question 11

The Java class you use to create windows:

Answer 11

JFrame

Question 12

Which of the following GUI components is used to get input into a GUI program ?

Answer 12

JTextField

Question 13

GUI stands for Graphical User Interface (T/F)

Answer 13

True

Question 14

Write a program that takes as input the radius of a circle and finds the circumference and area of the circle.

Based on this problem statement which of the follow would most likely be chosen as the class?

Answer 14

Circle

Question 15

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

Answer 15

All components are added directly to the GUI window.

Question 16

The class Container is included in the package Javax.swing. (T/F)

Answer 16

False

Question 17

An interface is a class that contains only the method headings, and each method heading is terminated with a period. (T/F)

Answer 17

False

Question 18

The first step in solving a problem using object-oriented design is to write down a detailed description of the problem. (T/F)

Answer 18

True

Question 19

When you click a JButton an event is created, known as an action event. (T/F)

Answer 19

True

Question 20

The class JFrame contains the method add.

Answer 20

False

Question 21

Both private and implements are modifiers in Java.

Answer 21

True

Question 22

Write a program to input 5 test scores of a student and calculate and print the mean, median, and mode of the scores.

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

Answer 22

Input, calculate, print.

Question 23

Given the declaration,

Integer num;

The following statements are equivalent:

num = 25;

num = new Integer(25);

(T/F)

Answer 23

True

Question 24

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

Answer 24

False

Question 25

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

Answer 25

Java.awt.*

Question 26

The method addWindowListener is included in the class JFrame. (T/F)

Answer 26

True

Question 27

Whenever there is a superclass-subclass relationship, the superclass inherits all data members and methods of the subclass. (T/F)

Answer 27

False

Question 28

Which class is a part of the package Java.awt?

Answer 28

Container

Question 29

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

Which word goes in the second blank?

Answer 29

Subclass