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Type Casting MCQ Questions and Answers

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Java Type Casting MCQ Questions and Answers: Here learn quiz questions and answers for competitive exam and test your answer each questions and download pdf of objective type questions on Java Type Casting.

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1) 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;

    1 and 2
    2 and 3
    3 and 4
    All statements are correct.

Answer : D Discuss

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

    int
    long
    byte
    float

Answer : A Discuss

3) Which of the following automatic type conversion will be possible?

    short to int
    byte to int
    int to long
    long to int

Answer : C Discuss

4) Which of these is necessary condition for automatic type conversion in Java?

    The destination type is smaller than source type
    The destination type is larger than source type
    The destination type can be larger or smaller than source type
    None of the mentioned

Answer : B Discuss

5) What is the prototype of the default constructor of this class?

      public class prototype { }

    prototype( )
    prototype(void)
    public prototype(void)
    public prototype( )

Answer : D Discuss

6) What is the error in this code?

      byte b = 50;
     b = b * 50;

    b can not contain value 100, limited by its range.
    * operator has converted b * 50 into int, which can not be converted to byte without casting.
    b can not contain value 50.
    No error in this code

Answer : B Discuss

7) If an expression contains double, int, float, long, then whole expression will promoted into which of these data types?

    long
    int
    double
    float

Answer : C Discuss

8) What is Truncation is Java?

    Floating-point value assigned to an integer type
    Integer value assigned to floating type
    Floating-point value assigned to an Floating type
    Integer value assigned to floating type

Answer : A Discuss

9) What is the output of this program?

      class char_increment      {
         public static void main(String args[])
          {
             char c1 = 'D';
             char c2 = 84;
             c2++;
             c1++;
             System.out.println(c1 + " "  + c2);
         }
      }

    E U
    U E
    V E
    U F

Answer : A Discuss

10) What is the output of this program?

      class conversion      {
         public static void main(String args[])
          {
             double a = 295.04;
             int  b = 300;
             byte c = (byte) a;
             byte d = (byte) b;
             System.out.println(c + " "  + d);
         }
      }

    38 43
    39 44
    295 300
    295.04 300

Answer : B Discuss

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