Question 1

Selecting a JList item generates ________.

Accepted Answer

A) an ActionEvent 
B) a ListItemEvent 
C) a ListSelectionEvent 
D) a ListSelectionItemEvent 
A) an ActionEvent 
B) a ListItemEvent 
C) a ListSelectionEvent 
D) a ListSelectionItemEvent

Question 2

A MouseHandler object implements which two interfaces?

Accepted Answer

A) MouseListener and MouseActionListener. 
B) MouseListener and MouseMotionListener. 
C) MouseListener and MouseEventListener. 
D) MouseListener only. 
A) MouseListener and MouseActionListener. 
B) MouseListener and MouseMotionListener. 
C) MouseListener and MouseEventListener. 
D) MouseListener only.

Question 3

The class GridLayout constructs to hold components.

Accepted Answer

A) a horizontal grid with one row 
B) a vertical grid with one column 
C) a grid with multiple rows and columns 
D) a square grid with the same number of rows as columns 
A) a horizontal grid with one row 
B) a vertical grid with one column 
C) a grid with multiple rows and columns 
D) a square grid with the same number of rows as columns

Question 4

Which of the following choices completes the sentence correctly?
A(n) is a(n).

Accepted Answer

A) JToggleButton,JCheckBox 
B) JToggleButton,JRadioButton 
C) JButton,JToggleButton 
D) JButton,AbstractButton 
A) JToggleButton,JCheckBox 
B) JToggleButton,JRadioButton 
C) JButton,JToggleButton 
D) JButton,AbstractButton

Question 5

In what cases are adapter classes useful?

Accepted Answer

A) When an adapter GUI control is clicked. 
B) When every method in the event-listener interface is to use the same functionality. 
C) When it is not desirable to declare every method in the event-listener interface. 
D) None of the above. 
A) When an adapter GUI control is clicked. 
B) When every method in the event-listener interface is to use the same functionality. 
C) When it is not desirable to declare every method in the event-listener interface. 
D) None of the above.

Question 6

Adding a ButtonGroup object to a container ________.

Accepted Answer

A) is necessary for the functionality of the ButtonGroup to work properly. 
B) causes all the JRadioButtons in the group to have their event handlers registered. 
C) results in a compilation error. 
D) None of the above. 
A) is necessary for the functionality of the ButtonGroup to work properly. 
B) causes all the JRadioButtons in the group to have their event handlers registered. 
C) results in a compilation error. 
D) None of the above.

Question 7

A user of a one-button mouse can simulate pushing the middle button on a three-button mouse by holding the while clicking the left mouse button.

Accepted Answer

A) Alt key. 
B) Meta key. 
C) Ctrl key. 
D) Shift key. 
A) Alt key. 
B) Meta key. 
C) Ctrl key. 
D) Shift key.

Question 8

The method setRolloverIcon is used to ________.

Accepted Answer

A) Handle a key event 
B) Change the button text 
C) Change the button icon 
D) All of the above 
A) Handle a key event 
B) Change the button text 
C) Change the button icon 
D) All of the above

Question 9

The setMaximumRowCount method is used for:

Accepted Answer

A) Button. 
B) JComboBox. 
C) JRadioButton. 
D) JToggleButton. 
A) Button. 
B) JComboBox. 
C) JRadioButton. 
D) JToggleButton.

Question 10

When the arrow on a JComboBox is clicked:

Accepted Answer

A) an ItemEvent occurs. 
B) a scrollbar always appears. 
C) an ActionEvent occurs. 
D) The JComboBox expands to a list. 
A) an ItemEvent occurs. 
B) a scrollbar always appears. 
C) an ActionEvent occurs. 
D) The JComboBox expands to a list.

Question 11

Which layout manager is the default for JFrame?

Accepted Answer

A) FlowLayout 
B) BorderLayout 
C) GridLayout 
D) None of the above 
A) FlowLayout 
B) BorderLayout 
C) GridLayout 
D) None of the above

Question 12

Using layout managers ________.

Accepted Answer

A) provides the greatest level of control over a GUI's appearance 
B) can be faster than creating a GUI with absolute positioning 
C) allows the programmer to specify the exact location of each GUI component with respect to the upper-left corner of the Container 
D) allows the programmer to specify the exact location of each GUI component with respect to the lower-left corner of the Container 
A) provides the greatest level of control over a GUI's appearance 
B) can be faster than creating a GUI with absolute positioning 
C) allows the programmer to specify the exact location of each GUI component with respect to the upper-left corner of the Container 
D) allows the programmer to specify the exact location of each GUI component with respect to the lower-left corner of the Container

Question 13

BorderLayout implements interface ________.

Accepted Answer

A) ActionListener 
B) FlowLayout. 
C) Layout 
D) LayoutManager2 
A) ActionListener 
B) FlowLayout. 
C) Layout 
D) LayoutManager2

Question 14

Consider the list below:
January
February
March
April
May
June
July
August
September
October
November
December
What type of JList selection mode would allow the user to select March,June and July in one step?

Accepted Answer

A) SINGLE_SELECTION. 
B) SINGLE_INTERVAL_SELECTION. 
C) MULTIPLE_INTERVAL_SELECTION. 
D) All of the above. 
A) SINGLE_SELECTION. 
B) SINGLE_INTERVAL_SELECTION. 
C) MULTIPLE_INTERVAL_SELECTION. 
D) All of the above.

Question 15

Which of the following is not a GUI component (control or widget)?

Accepted Answer

A) String. 
B) Button. 
C) Menu. 
D) Combo box. 
A) String. 
B) Button. 
C) Menu. 
D) Combo box.

Question 16

Method getSelectedValues of class JList returns:

Accepted Answer

A) an array of ints representing the indices of the selected items. 
B) an array of doubles representing the indices of the selected items. 
C) an array of Strings representing the selected items. 
D) an array of Objects representing the selected items. 
A) an array of ints representing the indices of the selected items. 
B) an array of doubles representing the indices of the selected items. 
C) an array of Strings representing the selected items. 
D) an array of Objects representing the selected items.

Question 17

The logical relationship between radio buttons is maintained by objects of what class?

Accepted Answer

A) MutualExclusionGroup 
B) RadioButtonGroup 
C) Group 
D) ButtonGroup 
A) MutualExclusionGroup 
B) RadioButtonGroup 
C) Group 
D) ButtonGroup

Question 18

Which of the following statements about a JLabel is false?

Accepted Answer

A) Applications rarely change a label's contents after creating it. 
B) A JLabel can display text and an image. 
C) A JLabel can display text and a button. 
D) A JLabel is a subclass of JComponent. 
A) Applications rarely change a label's contents after creating it. 
B) A JLabel can display text and an image. 
C) A JLabel can display text and a button. 
D) A JLabel is a subclass of JComponent.

Question 19

Which of the following is false?

Accepted Answer

A) A JPasswordField shows that characters are being entered,but hides the actual character with an echo character. 
B) Class JTextField extends JTextComponent;Class JPasswordField extends JTextField. 
C) Both JTextFields and JPasswordFields are single-line areas in which the user can enter text via the keyboard. 
D) JPasswordFields generate events;JTextFields do not. 
A) A JPasswordField shows that characters are being entered,but hides the actual character with an echo character. 
B) Class JTextField extends JTextComponent;Class JPasswordField extends JTextField. 
C) Both JTextFields and JPasswordFields are single-line areas in which the user can enter text via the keyboard. 
D) JPasswordFields generate events;JTextFields do not.

Question 20

Method indicates that a Component should be refreshed on screen as soon as possible with a call to that control's paintComponent method.

Accepted Answer

A) refresh 
B) repaint 
C) repaintComponent 
D) redraw 
A) refresh 
B) repaint 
C) repaintComponent 
D) redraw

Exam 12: Gui Components: Part 1

Selecting a JList item generates ________.

A MouseHandler object implements which two interfaces?

The class GridLayout constructs to hold components.

Which of the following choices completes the sentence correctly? A(n) is a(n).

In what cases are adapter classes useful?

Adding a ButtonGroup object to a container ________.

A user of a one-button mouse can simulate pushing the middle button on a three-button mouse by holding the while clicking the left mouse button.

The method setRolloverIcon is used to ________.

The setMaximumRowCount method is used for:

When the arrow on a JComboBox is clicked:

Which layout manager is the default for JFrame?

Using layout managers ________.

BorderLayout implements interface ________.

Consider the list below: January February March April May June July August September October November December What type of JList selection mode would allow the user to select March,June and July in one step?

Which of the following is not a GUI component (control or widget)?

Method getSelectedValues of class JList returns:

The logical relationship between radio buttons is maintained by objects of what class?

Which of the following statements about a JLabel is false?

Which of the following is false?

Method indicates that a Component should be refreshed on screen as soon as possible with a call to that control's paintComponent method.

Introduction to Computers and Java

Introduction to Java Applications

Introduction to Classes and Objects

Control Statements: Part 1

Control Statements: Part 2

Methods: a Deeper Look

Arrays and Arraylists

Classes and Objects: a Deeper Look

Object Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

Exception Handling

Graphics and Java 2D

Strings

Files,streams and Object Serialization

Generic Collections

Lambdas

Recursion

Searching, Sorting and Big O

Generic Classes and Methods

Custom Generic Data Structures

Concurrency

Accessing Databases With Jdbc

JavaFX

Filters