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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.

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) & (E)

  (A), (B), (C) & (E)

  (B), (D) & (E)

  (D) & (E)

  (B) & (E)

  Half-n-half Clue
 

2.

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

  hide()

  delete()

  move()

  remove()

  disappear()

  Half-n-half Clue
 

3.

Which of the following strings can be used as mode strings for creating a RandomAccessFile object?
(A) "r"
(B) "w"
(C) "rw"
(D) "wr"
(E) "0"

  (A) & (C)

  (B), (D) & (E)

  (A), (B) & (C)

  (C) & (D)

  (A), (B), (C) & (E)

  Half-n-half Clue
 

4.

DataInput is

  an interface that defines methods to open files.

  a class we can use to read primitive data types.

  an abstract class defined in java.io.

  an interface that defines methods to read primitive data types.

  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.

  (B), (D) & (E)

  (A), (D) & (E)

  (A), (C), (D) & (E)

  (A) & (D)

  (A), (B) & (D)

  Half-n-half Clue
 

6.

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

  Container

  Object

  Applet

  Component

  Graphics

  Half-n-half Clue
 

7.

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

  show()

  update()

  paint()

  draw()

  Half-n-half Clue
 


 
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