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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.

What does the following line of code do?
Textfield text = new Textfield(10);

  The code is illegal.

  Creates text object that can hold 10 columns of text.

  Creates the object text and initializes it with the value 10.

  Creates text object that can hold 10 rows of text.

  Half-n-half Clue
 

2.

Given file is a File object, which of the following are legal statements to create a new file?
(A) file.create();
(B) FileOutputStream fos = new FileOutputStream(file);
(C) FileWrter out = new FileWriter(file);
(D) FileInputStream fis = new FileInputStream(file);
(E) RandomAccessFile raf = new RandomAccessFile(file);

  (A), (B), (D) & (E)

  (B) & (C)

  (B), (D) & (E)

  (B), (C) & (E)

  (B), (C) & (D)

  Half-n-half Clue
 

3.

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()

  (C), (D) & (E)

  (A), (B), (C) & (E)

  (B) & (C)

  (A), (B) & (C)

  (B), (C) & (E)

  Half-n-half Clue
 

4.

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

  Exception

  IOException

  None of these

  ReadException

  FileNotFoundException

  Half-n-half Clue
 

5.

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 = radius value = 99 >

  < param number = 99 >

  < number = 99 >

  number = getParameter(99)

  Half-n-half Clue
 

6.

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
class = Test width = 200 height = 100>

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

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

  Half-n-half Clue
 

7.

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), (B) & (D)

  (A) & (D)

  (A), (D) & (E)

  (A), (C), (D) & (E)

  Half-n-half Clue
 


 
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