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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

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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()

  (D) & (E)

  (A), (B), (C) & (E)

  (A), (B) & (E)

  (B), (D) & (E)

  (B) & (E)

  Half-n-half Clue
 

2.

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), (B), (C) & (E)

  (C) & (D)

  (A) & (C)

  (B), (D) & (E)

  Half-n-half Clue
 

3.

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), (B) & (D)

  (A), (D) & (E)

  (A), (C), (D) & (E)

  (A) & (D)

  (B), (D) & (E)

  Half-n-half Clue
 

4.

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

  FileNotFoundException

  Exception

  IOException

  ReadException

  None of these

  Half-n-half Clue
 

5.

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

  Creates text object that can hold 10 columns of text.

  The code is illegal.

  Creates text object that can hold 10 rows of text.

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

  Half-n-half Clue
 

6.

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 >

  < param = radius value = 99 >

  number = getParameter(99)

  < number = 99 >

  Half-n-half Clue
 

7.

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);

  (B) & (C)

  (B), (D) & (E)

  (A), (B), (D) & (E)

  (B), (C) & (D)

  (B), (C) & (E)

  Half-n-half Clue
 


 
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