QUESTION 15 An error is generated by the compiler when you attempt to override a

Question

QUESTION 15

An error is generated by the compiler when you attempt to override a static method with a nonstatic method.

True

False

QUESTION 16

Java contains a class named ____ that allows you to produce dialog boxes.

JBox

JGUI

JDialog

JOptionPane

QUESTION 17

A(n) ____ variable is known only within the boundaries of the method.

double

local

method

instance

QUESTION 18

When a numeric variable is concatenated to a String, the entire expression becomes a(n) ____.

String

constant

int

method

QUESTION 19

Each JMenu can contain options, called JMenuItems, or can contain submenus that are ____.

JMenus

JMenuBars

JSubMenus

JMenuChildren

QUESTION 20

The ____ operator is always evaluated before the OR operator.

Logical

Assignment

Conditional

AND

QUESTION 21

Locating and repairing all syntax errors is part of the process of ____ a program.

compiling

executing

interpreting

debugging

QUESTION 22

Which of the following is NOT an initial value assigned to an object’s data field by a default constructor?

numeric fields set to 0

a field of object references set to null

character fields set to Unicode ‘u0000’

Boolean fields set to true

QUESTION 23

Regarding enumerations, the ____ method returns the name of the calling constant object.

nameOf

constName

ordinal

toString

QUESTION 24

The compiler determines which version of a method to call by the method’s ____.

constructor

name

signature

output

QUESTION 25

When an application contains just one version of a method, you can call the method using a(n) ____ of the correct data type.

constructor

parameter

scope

output

  

QUESTION 26

When you initialize parallel arrays, it is convenient to use ____ so that the values that correspond to each other visually align on the screen or printed page.

spacing

indentation

tabs

dashes

QUESTION 27

An additional layered pane exists above the root pane, but it is not often used explicitly by Java programmers.

True

False

QUESTION 28

If you create an empty method within an abstract class, the method is abstract even if you do not explicitly use the keyword abstract.

True

False

QUESTION 29

Which FontMetrics class method returns information about the part of characters that hang below the baseline?

getAscent()

getLeading()

getHeight()

get_Descent()

  

QUESTION 30

When working with logical operators, you can always use ____ to change precedence.

parentheses

conditional operators

break statements

semicolons

  

QUESTION 31

int[][] myVals = {{2, 4, 6},
                  {1, 3, 5, 7}};

Using the above array, what is the value of myVals.length?

5

1

2

4

QUESTION 32

The String class ____ method evaluates the contents of two String objects to determine if they are equivalent.

charAt()

equals()

toString()

replace()

QUESTION 33

When a protected data field or method is created, it can be used within its own class or in any classes extended from that class; but it cannot be used by outside classes.

True

False

  

QUESTION 34

A ____ is placed at the top of a container and contains user options.

content pane

glass pane

containment hierarchy

menu bar

QUESTION 35

Which of the following statements will change the value displayed in a JLabel named hello?

hello = setText("Hello");

setText.hello = "Hello"

setText = hello

hello.setText("Hello");

  

QUESTION 36

While a class can inherit from multiple abstract superclasses, it implement only one interface.

True

False

  

QUESTION 37

If you want all objects to share a single nonchanging value, then the field is static and ______.

class

permanent

end

final

QUESTION 38

The simplest possible sort involves two values that are out of order.

True

False

  

QUESTION 39

When you create a superclass and one or more subclasses, each object of each subclass is a subclass object.

True

False

QUESTION 40

When constructing a Font object, which of the following arguments is NOT required?

style

typeface

point size

weight

QUESTION 41

It is common to create an interface when you want a class to implement behavior from more than one parent.

True

False

QUESTION 42

The following statement produces a dark purple color that has green and blue components, but no red:
Color darkPurple = new Color(100, 0, 100);

True

False

QUESTION 43

An application’s main() method must have a void return type.

True

False

QUESTION 44

The parent class of MouseEvent is ____.

EventObject

AWTEvent

UserEvent

InputEvent

QUESTION 45

The expression  boolean isTenLarger = (10 < 5) will produce a value of true.

True

False

QUESTION 46

A ____ is an error not detected until the program asks the computer to do something wrong, or even illegal, while executing.

package

run-time error

Java API

syntax error

QUESTION 47

You can create a confirm dialog box with five arguments.

True

False

  

QUESTION 48

You can leave out the ____ statements in a switch structure.

case

break

switch

if

QUESTION 49

Clicking a component results in a(n) ____.

WindowEvent

ItemEvent

ActionEvent

MouseEvent

QUESTION 50

Method names that begin with ____ and set are very typical.

read

call

get

next

a.

JBox

b.

JGUI

c.

JDialog

d.

JOptionPane

Explanation / Answer

15.true

48.B

49.C

45:false

44.a

43.false

41.true

39.true

37.d

33.true

32.b

28.true

22.a

21.a

20.d

17.c

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