Question 1

A ____ is placed at the top of a container and contains user options.
A) glass pane
B) menu bar
C) content pane
D) containment hierarchy

Accepted Answer

A menu bar is commonly used in software applications to provide users with a list of options or actions that they can perform within the application. It is typically located at the top of the application window and can be customized to include various menus and submenus.

Question 2

What is the parent class of JPanel?
A) Object
B) Component
C) JComponent
D) Container

Accepted Answer

The JPanel class is a subclass of the JComponent class, which in turn is a subclass of the Container class. Therefore, the immediate parent class of JPanel is JComponent.

Question 3

Use the ____ layout manager when you need to add components that are displayed one at a time.
A) BorderLayout
B) GridLayout
C) GridBagLayout
D) CardLayout

Accepted Answer

The CardLayout manager is designed specifically for adding and displaying components one at a time, making it the best choice for this scenario. The other layout managers listed may be useful for other types of layouts, but they are not ideal for this situation.

Question 4

When you create a simple scroll pane using the constructor that takes no arguments, horizontal and vertical scroll bars appear only if they are needed.

Accepted Answer

When using the constructor that takes no arguments, the default behavior is to only display scroll bars when they are needed based on the content within the scroll pane.

Question 5

With ____, a redrawn JPanel is displayed only when it is complete; this provides the viewer with updated screens that do not flicker while being redrawn.
A) single buffering
B) double buffering
C) auto filtering
D) double framing

Accepted Answer

Double buffering in Java ensures that a redrawn JPanel is displayed only when it is complete, providing the viewer with updated screens that do not flicker while being redrawn. This technique involves drawing the image off-screen and then displaying it all at once, which helps to eliminate visual artifacts and improves the overall visual experience for the viewer. Single buffering, on the other hand, can lead to flickering and visual errors while redrawing the image. Auto filtering and double framing are not related to this concept in Java.

Question 6

If you do not specify alignment, Components are right-aligned in a FlowLayout Container by default.

Accepted Answer

If you do not specify alignment, Components are left-aligned in a FlowLayout Container by default.

Question 7

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

Accepted Answer

The answer of The following statement produces a dark purple...

Question 8

When components in a Swing UI require more display area than they have been allocated, you can use a ____ container to hold the components and allow the user to display the components using scroll bars.
A) JScrollingPane
B) ScrollLayout
C) JPanel
D) JScrollPane

Accepted Answer

The JScrollPane container is specifically designed to allow components to be displayed within a confined area and use scroll bars to navigate through the content. The JScrollingPane and ScrollLayout options do not exist in the Swing library. While a JPanel can be used as a container, it does not provide automatic scroll bars for components that exceed the allocated space.

Question 9

A common mistake when using BorderLayout is to add a Component to a content pane or frame without naming a region, resulting in some of the components not being visible.

Accepted Answer

This is a common mistake when using BorderLayout. If a component is added without specifying a region, it will be added to the center region by default, potentially covering up any other components that were added to other regions.

Question 10

The FlowLayout class contains ____ constants you can use to align Components with a Container.
A) two
B) three
C) five
D) six

Accepted Answer

The FlowLayout class contains three constants: LEFT, CENTER, and RIGHT, which can be used to align components with the container.

Question 11

The Color class contains ____ predefined color constants.
A) 7
B) 12
C) 13
D) 15

Accepted Answer

The Color class contains 13 predefined color constants, such as RED, BLUE, GREEN, YELLOW, etc., which can be used to render colored shapes and text.

Question 12

The wildcard in the import java.awt.* statement imports all types in the java.awt package, including java.awt.Color and java.awt.Font.

Accepted Answer

The answer of The wildcard in the import java.awt.* statement...

Question 13

Java automatically converts the add(), remove(), and setLayoutManager() statements to more complete versions that include _____.
A) getContentPane()
B) glassPane()
C) getJFrame()
D) addAll()

Accepted Answer

The getContentPane() method is used to retrieve the content pane layer of JFrame, and is often included implicitly in add(), remove(), and setLayoutManager() statements in Java.

Question 14

Layout managers are interface classes that align components to prevent crowding or overlapping.

Accepted Answer

Layout managers are designed to help organize and position components within a container to ensure a visually appealing and functional user interface. They prevent crowding and overlapping by managing the size and position of components during runtime.

Question 15

You use FlowLayout when you want fixed rows and columns of components, and when you want the components to fill available space.

Accepted Answer

FlowLayout does not provide fixed rows and columns of components. It simply arranges components left to right, wrapping to the next row when it reaches the end of the container. It also does not fill available space, instead it centers components vertically and horizontally within their allotted space.

Question 16

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

Accepted Answer

The JLayeredPane is an additional layered pane in Swing but it is often used by Java programmers to manage the layering of components in a GUI.

Question 17

Use the ____ layout manager when you add components to a maximum of five sections.
A) BorderLayout
B) GridLayout
C) GridBagLayout
D) CardLayout

Accepted Answer

The answer of Use the ____ layout manager when you...

Question 18

Any component you place on the screen has a vertical, or x-axis, position as well as a horizontal, or y-axis, position in the window.

Accepted Answer

The statement has mistakenly switched the axes. The correct statement is that any component you place on the screen has a horizontal, or x-axis, position as well as a vertical, or y-axis, position in the window.

Question 19

With GridLayout, you can specify the number of rows only; you can use ____ for the number of columns and let the layout manager determine the number of columns.
A) null
B) 0
C) 99
D) -1

Accepted Answer

With GridLayout, you can specify the number of rows and columns, but if you set the number of columns as 0 or not specified, the layout manager will determine the number of columns based on the number of components added to the layout. Therefore, the best choice is B) 0.

Question 20

When you use BorderLayout, you are required to add components into each of the five regions.

Accepted Answer

While it is recommended to add components in all five regions, it is not required. Components can be added to only one or a few regions and the layout manager will adjust accordingly.

Quiz 15: Advanced Gui Topics

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

What is the parent class of JPanel?

Use the ____ layout manager when you need to add components that are displayed one at a time.

When you create a simple scroll pane using the constructor that takes no arguments, horizontal and vertical scroll bars appear only if they are needed.

With ____, a redrawn JPanel is displayed only when it is complete; this provides the viewer with updated screens that do not flicker while being redrawn.

If you do not specify alignment, Components are right-aligned in a FlowLayout Container by default.

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

When components in a Swing UI require more display area than they have been allocated, you can use a ____ container to hold the components and allow the user to display the components using scroll bars.

A common mistake when using BorderLayout is to add a Component to a content pane or frame without naming a region, resulting in some of the components not being visible.

The FlowLayout class contains ____ constants you can use to align Components with a Container.

The Color class contains ____ predefined color constants.

The wildcard in the import java.awt.* statement imports all types in the java.awt package, including java.awt.Color and java.awt.Font.

Java automatically converts the add() , remove() , and setLayoutManager() statements to more complete versions that include _____.

Layout managers are interface classes that align components to prevent crowding or overlapping.

You use FlowLayout when you want fixed rows and columns of components, and when you want the components to fill available space.

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

Use the ____ layout manager when you add components to a maximum of five sections.

Any component you place on the screen has a vertical, or x-axis, position as well as a horizontal, or y-axis, position in the window.

With GridLayout, you can specify the number of rows only; you can use ____ for the number of columns and let the layout manager determine the number of columns.

When you use BorderLayout, you are required to add components into each of the five regions.