Question 1

To create a _____ layout, you supply the number of rows and columns in the constructor, then add the components, row by row, left to right.

Accepted Answer

A)  border 
B)  grid 
C)  grid bag 
D)  boxed 
A)  border 
B)  grid 
C)  grid bag 
D)  boxed

Question 2

If one ChangeListener is listening for three different JSlider objects, how can we determine which of the three sliders caused the event when the code enters the stateChanged method?

Accepted Answer

A)  It is not possible. 
B)  We can compare the sliders using the getSource method. 
C)  We can call the getValueIsAdjusting method. 
D)  We can compare the sliders using the getSliderSource method. 
A)  It is not possible. 
B)  We can compare the sliders using the getSource method. 
C)  We can call the getValueIsAdjusting method. 
D)  We can compare the sliders using the getSliderSource method.

Question 3

Given four JRadioButton objects in a ButtonGroup, how many radio buttons can be selected at the same time?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  3 
A)  1 
B)  2 
C)  4 
D)  3

Question 4

What is the most time-effective way to build a GUI quickly and concentrate on coding the logic of the program?

Accepted Answer

A)  use the GridBagLayout manager 
B)  use a GUI builder, such as NetBeans 
C)  use nested panels 
D)  use menus 
A)  use the GridBagLayout manager 
B)  use a GUI builder, such as NetBeans 
C)  use nested panels 
D)  use menus

Question 5

Which layout manger would be best suited to create a simple navigation GUI with directional arrows for left, right, up, down and enter?

Accepted Answer

A)  GridLayout 
B)  BorderLayout 
C)  FlowLayout 
D)  GridBagLayout 
A)  GridLayout 
B)  BorderLayout 
C)  FlowLayout 
D)  GridBagLayout

Question 6

Which code will create a JSlider with a range from 0 to 100, with an initial value of 50?
I new JSlider()
II new JSlider(0, 100, 50)
III new JSlider(50, 0, 100)

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  I and II 
A)  I 
B)  II 
C)  III 
D)  I and II

Question 7

The ChangeEvent class defines no methods. What makes it possible to call the getSource method on a ChangeEvent object?

Accepted Answer

A)  The method is inherited from the Object class. 
B)  You have to code that method yourself. 
C)  The method is inherited from the EventObject class. 
D)  ChangeEvent implements the Event interface 
A)  The method is inherited from the Object class. 
B)  You have to code that method yourself. 
C)  The method is inherited from the EventObject class. 
D)  ChangeEvent implements the Event interface

Question 8

Which layout manager allows you to add components to it by invoking the container's add method with the component as the only argument to add.
I FlowLayout
II BorderLayout
III GridLayout

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  I and III 
A)  I 
B)  II 
C)  III 
D)  I and III

Question 9

When using a combo box, the _______ displays the name of the current selection.

Accepted Answer

A)  text field 
B)  text area 
C)  menu item 
D)  submenu item 
A)  text field 
B)  text area 
C)  menu item 
D)  submenu item

Question 10

If you want to have a tabular arrangement of components, in which columns have different sizes or one component spans multiple columns, a ____ would be appropriate.

Accepted Answer

A)  grid bag layout 
B)  grid layout 
C)  flow layout 
D)  border layout 
A)  grid bag layout 
B)  grid layout 
C)  flow layout 
D)  border layout

Question 11

Which class has constants called NORTH and SOUTH?

Accepted Answer

A)  FlowLayout 
B)  BorderLayout 
C)  BoxLayout 
D)  GridLayout 
A)  FlowLayout 
B)  BorderLayout 
C)  BoxLayout 
D)  GridLayout

Question 12

What is known for certain from this correct code excerpt? ActionListener openListener = new FileOpenListener();
JMenuItem fileOpen = new JMenuItem("Open File");
FileOpen.addActionListener(openListener);

Accepted Answer

A)  fileOpen will open a file dialog when clicked 
B)  The fileOpen menu item will be visible 
C)  The FileOpenListener class implements the ActionListener interface 
D)  The openListener object will only listen to the fileOpen object 
A)  fileOpen will open a file dialog when clicked 
B)  The fileOpen menu item will be visible 
C)  The FileOpenListener class implements the ActionListener interface 
D)  The openListener object will only listen to the fileOpen object

Question 13

In Java, each container has its own ____________________, which determines how the components are laid out.

Accepted Answer

A)  container 
B)  layout manager 
C)  Swing component 
D)  frame manager 
A)  container 
B)  layout manager 
C)  Swing component 
D)  frame manager

Question 14

The code below will not compile successfully unless the argument to the makeMenuItem method is final. Why not? public JMenuItem makeMenuItem(final String menuLabel)
{
JMenuItem mi = new JMenuItem(menuLabel);
Class MyMenuListener implements ActionListener
{
Public void actionPerformed(ActionEvent

Accepted Answer

A)  JMenuItem labels must be final 
B)  This prevents the menuLabel argument from being modified 
C)  Because a local variable is being accessed from an inner classes 
D)  Because the String class is final 
E)  {
DoSomethingElse();
System.out.println(menuLabel);
}
}
Mi)addActionListener(new MyMenuListener());
Return mi;
} 
A)  JMenuItem labels must be final 
B)  This prevents the menuLabel argument from being modified 
C)  Because a local variable is being accessed from an inner classes 
D)  Because the String class is final 
E)  {
DoSomethingElse();
System.out.println(menuLabel);
}
}
Mi)addActionListener(new MyMenuListener());
Return mi;
}

Question 15

Which of the following GUI objects generate(s) action events?
I JComboBox
II JRadioButton
III JButton

Accepted Answer

A)  I 
B)  I and II 
C)  I and III 
D)  I, II and III 
A)  I 
B)  I and II 
C)  I and III 
D)  I, II and III

Question 16

Which GUI element allows text entry from the program user?

Accepted Answer

A)  ButtonGroup 
B)  JComboBox 
C)  JSlider 
D)  JPanel 
A)  ButtonGroup 
B)  JComboBox 
C)  JSlider 
D)  JPanel

Exam 19: Graphical User Interfaces

To create a _____ layout, you supply the number of rows and columns in the constructor, then add the components, row by row, left to right.

If one ChangeListener is listening for three different JSlider objects, how can we determine which of the three sliders caused the event when the code enters the stateChanged method?

Given four JRadioButton objects in a ButtonGroup, how many radio buttons can be selected at the same time?

What is the most time-effective way to build a GUI quickly and concentrate on coding the logic of the program?

Which layout manger would be best suited to create a simple navigation GUI with directional arrows for left, right, up, down and enter?

Which code will create a JSlider with a range from 0 to 100, with an initial value of 50? I new JSlider() II new JSlider(0, 100, 50) III new JSlider(50, 0, 100)

The ChangeEvent class defines no methods. What makes it possible to call the getSource method on a ChangeEvent object?

Which layout manager allows you to add components to it by invoking the container's add method with the component as the only argument to add. I FlowLayout II BorderLayout III GridLayout

When using a combo box, the _______ displays the name of the current selection.

If you want to have a tabular arrangement of components, in which columns have different sizes or one component spans multiple columns, a ____ would be appropriate.

Which class has constants called NORTH and SOUTH?

What is known for certain from this correct code excerpt? ActionListener openListener = new FileOpenListener(); JMenuItem fileOpen = new JMenuItem("Open File"); FileOpen.addActionListener(openListener);

In Java, each container has its own ____________________, which determines how the components are laid out.

The code below will not compile successfully unless the argument to the makeMenuItem method is final. Why not? public JMenuItem makeMenuItem(final String menuLabel) { JMenuItem mi = new JMenuItem(menuLabel); Class MyMenuListener implements ActionListener { Public void actionPerformed(ActionEvent

Which of the following GUI objects generate(s) action events? I JComboBox II JRadioButton III JButton

Which GUI element allows text entry from the program user?

Introduction

Using Objects

Implementing Classes

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Inputoutput and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Streams and Binary Inputoutput

Multithreading

Internet Networking

Relational Databases

XML

Web Applications

Filters