206. What is a listener in context to event handling?

1. 1. A listener is a method that is notified when an event occurs

   
   
   

   2. A listener is a variable that is notified when an event occurs

   
   
   

   3. A listener is a object that is notified when an event occurs

   
   
   

   4. All of above

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   A listener is a object that is notified when an event occurs. It has two major requirements first, it must have been registered with one or more sources to receive notification about specific event types, and secondly it must implement methods to receive and process these notifications.

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207. Which of these methods are used to register a mouse motion listener?

1. 1. eventMouseMotionListener()

   
   
   

   2. addMouse()

   
   
   

   3. addMouseListener()

   
   
   

   4. addMouseMotionListner()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   addMouseMotionListner()

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208. Which of these methods are used to register a keyboard event listener?

1. 1. eventKeyboardListener()

   
   
   

   2. KeyListener()

   
   
   

   3. addKistener()

   
   
   

   4. addKeyListener()

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   addKistener()

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209. What is an event in delegation event model used by Java programming language?

1. 1. An event is a class used for defining object, to create events

   
   
   

   2. An event is an object that describes any change by the user and system

   
   
   

   3. An event is an object that describes a state change in processing

   
   
   

   4. An event is an object that describes a state change in a source

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   An event is an object that describes a state change in a source.

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210. Which of these packages contains all the classes and methods required for even handling in Java?

1. 1. java.event

   
   
   

   2. java.awt.event

   
   
   

   3. java.awt

   
   
   

   4. java.applet

   
   
   

   5. None of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: B

   Most of the event to which an applet response is generated by a user. Hence they are in Abstract Window Kit package, java.awt.event.

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