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MCQs

Total Questions : 10
Question 1.

Which of these is superclass of all Adapter classes?


  1.    Applet
  2.    ComponentEvent
  3.    Event
  4.    InputEvent
 Discuss Question
Answer: Option A. -> Applet

All Adapter classes extend Applet class.


Question 2.

Which of these are constants defined in WindowEvent class?


  1.    WINDOW_ACTIVATED
  2.    WINDOW_CLOSED
  3.    WINDOW_DEICONIFIED
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned

WindowEvent class defines 7 constants - WINDOW_ACTIVATED, WINDOW_CLOSED, WINDOW_OPENED, WINDOW_DECONIFIED, WINDOW_CLOSING, WINDOW_DEACTIVATED, WINDOW_ICONIFIED.


Question 3.

Which of these methods is defined in MouseMotionAdapter class?


  1.    mouseDragged()
  2.    mousePressed()
  3.    mouseReleased()
  4.    mouseClicked()
 Discuss Question
Answer: Option A. -> mouseDragged()

The MouseMotionAdapter class defines 2 methods – mouseDragged() and mouseMoved.


Question 4.

Which of these methods will be invoked if a character is entered?


  1.    keyPressed()
  2.    keyReleased()
  3.    keyTyped()
  4.    keyEntered()
 Discuss Question
Answer: Option C. -> keyTyped()

None.


Question 5.

Which of these methods will respond when you click any button by mouse?


  1.    mouseClicked()
  2.    mouseEntered()
  3.    mousePressed()
  4.    All of the mentioned
 Discuss Question
Answer: Option D. -> All of the mentioned

when we click a button, first we enter the region of button hence mouseEntered() method 

Question 6.

Which of these interfaces define a method itemStateChanged()?


  1.    ComponentListener
  2.    ContainerListener
  3.    ActionListener
  4.    ItemListener
 Discuss Question
Answer: Option D. -> ItemListener

None.


Question 7.

Which of these interfaces define four methods?


  1.    ComponentListener
  2.    ContainerListener
  3.    ActionListener
  4.    InputListener
 Discuss Question
Answer: Option A. -> ComponentListener

ComponentListener defines four methods componentResized(), componentMoved(), 

componentShown() and componentHidden().


Question 8.

Which of these packages contains all the event handling interfaces?


  1.    java.lang
  2.    java.awt
  3.    java.awt.event
  4.    java.event
 Discuss Question
Answer: Option C. -> java.awt.event

None.


Question 9.

Which of these interfaces define a method actionPerformed()?


  1.    ComponentListener
  2.    ContainerListener
  3.    ActionListener
  4.    InputListener
 Discuss Question
Answer: Option C. -> ActionListener

ActionListener defines the actionPerformed() method that is invoked when an 

adjustment event occurs.


Question 10.

Which of these interfaces handles the event when a component is added to 

a container?


  1.    ComponentListener
  2.    ContainerListener
  3.    FocusListener
  4.    InputListener
 Discuss Question
Answer: Option B. -> ContainerListener

The ContainerListener defines methods to recognize when a component is added to 

or removed from a container.


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