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

  (A), (B) & (C)

  (A) & (C)

  (C) & (D)

  (A), (B), (C) & (E)

  (B), (D) & (E)

  Half-n-half Clue
 

2.

If you want to assign a value of 99 to the variable year, then which of the following lines can be used within an tag?

  < param name = number value = 99 >

  < param number = 99 >

  number = getParameter(99)

  < param = radius value = 99 >

  < number = 99 >

  Half-n-half Clue
 

3.

Which of the following applet tags is legal to embed an applet class named Test into a Web page?

  < applet
code = Test.class width = 200 height = 100

  < applet>
code = Test.class width = 200 height = 100>

  < applet
param = Test.class width = 200 height = 100>

  < applet
code = Test.class width = 200 height = 100>

  < applet
class = Test width = 200 height = 100>

  Half-n-half Clue
 

4.

Which exception is thrown by the read() method of InputStream class?

  ReadException

  IOException

  FileNotFoundException

  Exception

  None of these

  Half-n-half Clue
 

5.

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

  Container

  Applet

  Object

  Component

  Graphics

  Half-n-half Clue
 

6.

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) & (D)

  (B), (D) & (E)

  (A), (B) & (D)

  (A), (D) & (E)

  Half-n-half Clue
 

7.

Which are the valid ways to create DataInputStream streams?

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

  new DataInputStream("in.dat")

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

  new DataInputStream();

  new DataInputStream("in.dat", "r");

  Half-n-half Clue
 


 
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