Mcq On Java Data types

21. What is the range of short data type in Java?

A. -128 to 127
B. -32768 to 32767
C. -2147483648 to 2147483647
D. None of the mentioned

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22. Which of the following are legal lines of Java code?

  1. int w = (int)888.8;
  2. byte x = (byte)100L;
  3. long y = (byte)100;
  4. byte z = (byte)100L;

A. 1 and 2
B. 2 and 3
C. 3 and 4
D. All statements are correct

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23. An expression involving byte, int, and literal numbers is promoted to which of these?

A. int
B. byte
C. long
D. float

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24.Which of these literals can be contained in float data type variable?

A. -1.7e+308
B. -3.4e+038
C. +1.7e+308
D. -3.4e+050

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25. Which data type value is returned by all transcendental math functions?

A. int
B. float
C. double
D. long

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26. Which of these coding types is used for data type characters in Java?

A. ASCII
B. ISO-LATIN-1
C. UNICODE
D. None of the mentioned

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27. Which one is a valid declaration of a boolean?

A. boolean b1 = 1;
B. boolean b2 = ‘false’;
C. boolean b3 = false;
D. boolean b4 = ‘true’

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28. What is the output of this program?

 class array_output {
 public static void main(String args[])
  {
   char array_variable [] = new char[10];
   for (int i = 0; i < 10; ++i) {
    array_variable[i] = 'i';
    System.out.print(array_variable[i] + "" );
    i++;
   }
  }
 }

A. i i i i i
B. 0 1 2 3 4
C. i j k l m
D. None of the mentioned

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29. Which of these is long data type literal?

A. 0x99fffL
B. ABCDEFG
C. 0x99fffa
D. 99671246

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30. Which of these can be returned by the operator &?

A. Integer
B. Boolean
C. Character
D. Integer or Boolean

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