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Java Swing Interview Questions and Answers

Ques 6. What are heavyweight components ?

Ans. A heavyweight component is one that is associated with its own native screen resource (commonly known as a peer).

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Ques 7. What is lightweight component?
Ans. A lightweight component is one that "borrows" the screen resource of an ancestor (which means it has no native resource of its own -- so it's "lighter").
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Ques 8. What is double buffering ?
Ans. Double buffering is the process of use of two buffers rather than one to temporarily hold data being moved to and from an I/O device. Double buffering increases data transfer speed because one buffer can be filled while the other is being emptied.
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Ques 9. What is an event in Swing?
Ans. Changing the state of an object is called an event.
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Ques 10. What is an event handler in swing?
Ans. An event handler is a part of a computer program created to tell the program how to act in response to a specific event.
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