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Java Programming : java.awt and java.io : Multiple Choice


Learn about java.awt and java.io packages.

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Multiple choice

Your Performance  

1.

The setBackground() method is part of the following class in java.awt package:

  Object

  Component

  Graphics

  Applet

  Container

  Half-n-half Clue
 

2.

Which of the following methods can be used to draw the outline of a square within a java.awt.Component object?
(A) fillRect()
(B) drawLine()
(C) drawRect()
(D) drawString()
(E) drawPolygon()

  (A), (B), (C) & (E)

  (B) & (C)

  (B), (C) & (E)

  (A), (B) & (C)

  (C), (D) & (E)

  Half-n-half Clue
 

3.

Which of the following methods can be used to change the size of a java.awt.Component object?
(A) dimension()
(B) setSize()
(C) area()
(D) size()
(E) resize()

  (A), (B), (C) & (E)

  (B), (D) & (E)

  (D) & (E)

  (B) & (E)

  (A), (B) & (E)

  Half-n-half Clue
 

4.

Which are the valid ways to create DataInputStream streams?

  new DataInputStream(new File("in.dat"));

  new DataInputStream("in.dat", "r");

  new DataInputStream(new FileInputStream("in.dat");

  new DataInputStream("in.dat")

  new DataInputStream();

  Half-n-half Clue
 

5.

Which of the following statements are true?
(A) Unicode characters are all 16 bits.
(B) UTF characters are all 24 bits.
(C) Reader class has methods that can read integers and floats.
(D) File class may be used to rename a file.
(E) DataOutputStream objects are used to write primitive data to a file.

  (A), (C), (D) & (E)

  (A), (B) & (D)

  (B), (D) & (E)

  (A) & (D)

  (A), (D) & (E)

  Half-n-half Clue
 

6.

Which of the following methods can be used to remove a java.awt.Component object from the display?

  delete()

  hide()

  disappear()

  move()

  remove()

  Half-n-half Clue
 

7.

When we invoke repaint() for a java.awt.Component object, the AWT invokes the method:

  draw()

  update()

  paint()

  show()

  Half-n-half Clue
 


 
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