Java Events and Handling

What is the primary cause of an event in a graphical user interface?

A network request
A change in the state of an object (correct)
A request to the operating system
A bug in the program

What is the term for the code executed when an event occurs?

Event notifier
Event generator
Event listener
Event handler (correct)

What model does Java use to handle events?

Notification Event Model
Delegation Event Model (correct)
Publish-subscribe Event Model
Observer Event Model

What is the benefit of the Delegation Event Model?

Seperation of user interface logic from event generation logic (A) Signup and view all the answers

What is the purpose of registering a listener with a source object?

To receive event notifications (C) Signup and view all the answers

What is the first step in event handling?

The user clicks the button and the event is generated (B) Signup and view all the answers

What is the main purpose of a Layout Manager in Java?

To arrange components in a particular manner (C) Signup and view all the answers

What is the default layout of a frame or window in Java?

BorderLayout (A) Signup and view all the answers

How many regions can a component be placed in using BorderLayout?

5 (B) Signup and view all the answers

Which of the following layout managers is used to arrange components in a line, one after another?

FlowLayout (A) Signup and view all the answers

What is the name of the interface implemented by all the classes of layout managers in Java?

LayoutManager (C) Signup and view all the answers

How many components can be placed in each region of a BorderLayout?

1 (C) Signup and view all the answers

In a Java GridLayout, what determines the number of columns in the grid?

The default value is one column per component in a row (A) Signup and view all the answers

What is the purpose of the hgap and vgap parameters in GridLayout constructor?

To set the horizontal and vertical gaps between components (C) Signup and view all the answers

In a Java CardLayout, how many components are visible at a time?

Only one component is visible at a time (D) Signup and view all the answers

What is the purpose of the GridBagLayout class?

To align components vertically, horizontally or along their baseline (B) Signup and view all the answers

What is the default horizontal and vertical gap in CardLayout?

Zero horizontal and vertical gap (B) Signup and view all the answers

In a GridBagLayout, what is the display area of a component?

The area occupied by the component in the grid (D) Signup and view all the answers

What is the purpose of a GridBagConstraints object in a GridBagLayout?

To manage the size of components in a grid (C) Signup and view all the answers

How does the GridBagLayout manage the size of components?

By considering the minimum and preferred sizes of each component (C) Signup and view all the answers

What is unique about the arrangement of components in a GridBagLayout?

Components can have different sizes and occupy multiple rows or columns (D) Signup and view all the answers

What is the purpose of the BoxLayout class?

To arrange components either vertically or horizontally (A) Signup and view all the answers

What determines the alignment of components in a BoxLayout?

The ComponentOrientation property of the container (D) Signup and view all the answers

What is the purpose of the LINE_AXIS constant in the BoxLayout class?

To align components similar to the way words are aligned in a line (C) Signup and view all the answers

In a horizontal orientation, how are components aligned based on the ComponentOrientation property of the container?

Horizontally, if the container's ComponentOrientation property is from left to right (B) Signup and view all the answers

What is the purpose of a Container in a SWING GUI?

To provide a space where a component can be located (D) Signup and view all the answers

What determines the alignment of components in a BoxLayout?

The axis specified in the BoxLayout constructor (A) Signup and view all the answers

In a vertical orientation, how are components rendered?

From top to bottom, regardless of the container's ComponentOrientation property (C) Signup and view all the answers

What is the purpose of the PAGE_AXIS alignment in BoxLayout?

To align components similar to the way text lines are put on a page (C) Signup and view all the answers

What is the constructor of the BoxLayout class?

BoxLayout(Container c, int axis) (D) Signup and view all the answers

Java Events and Handling

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Questions and Answers

What is the primary cause of an event in a graphical user interface?

What is the term for the code executed when an event occurs?

What model does Java use to handle events?

What is the benefit of the Delegation Event Model?

What is the purpose of registering a listener with a source object?

What is the first step in event handling?

What is the main purpose of a Layout Manager in Java?

What is the default layout of a frame or window in Java?

How many regions can a component be placed in using BorderLayout?

Which of the following layout managers is used to arrange components in a line, one after another?

What is the name of the interface implemented by all the classes of layout managers in Java?

How many components can be placed in each region of a BorderLayout?

In a Java GridLayout, what determines the number of columns in the grid?

What is the purpose of the hgap and vgap parameters in GridLayout constructor?

In a Java CardLayout, how many components are visible at a time?

What is the purpose of the GridBagLayout class?

What is the default horizontal and vertical gap in CardLayout?

In a GridBagLayout, what is the display area of a component?

What is the purpose of a GridBagConstraints object in a GridBagLayout?

How does the GridBagLayout manage the size of components?

What is unique about the arrangement of components in a GridBagLayout?

What is the purpose of the BoxLayout class?

What determines the alignment of components in a BoxLayout?

What is the purpose of the LINE_AXIS constant in the BoxLayout class?

In a horizontal orientation, how are components aligned based on the ComponentOrientation property of the container?

What is the purpose of a Container in a SWING GUI?

What determines the alignment of components in a BoxLayout?

In a vertical orientation, how are components rendered?

What is the purpose of the PAGE_AXIS alignment in BoxLayout?

What is the constructor of the BoxLayout class?

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