Which of these constant value will change when the button at the end of scroll bar was clicked to increase its value?

What is an event in Java?

A. An action or occurrence to which a program can respond

B. A Java class that handles exceptions

C. A type of exception

D. A data type

In Java event handling, what is an event source?

A. An event listener

B. A keyword used to declare events

C. A method that handles events

D. An object that generates events

Which package in Java contains classes for event handling?

A. `java.util`

B. `java.swing`

C. `java.awt.event`

D. `java.io`

What is an event listener in Java?

A. A Java class that generates events

B. An object that listens for events and responds to them

C. A method that handles events

D. None of These