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C# Programming :: Operators

  1. What will be the output of the C#.NET code snippet given below?

     int num = 1, z = 5; 
    
     if (!(num 0))  
        Console.WriteLine( ++num + z++ + " " + ++z );
      else   
        Console.WriteLine( --num + z-- + " " + --z ); 
    
    

  2. A.

    5 6

    B.

    6 5

    C.

    6 6

    D.

    7 7

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  3. Suppose n is a variable of the type Byte and we wish to put OFF its fourth bit (from right) without disturbing any other bits. Which of the following statements will do this correctly?

  4. A.
    n = n && HF7
    B.
    n = n & 16
    C.
    n = n & 0xF7
    D.
    n = n & HexF7
    E.
    n = n & 8

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  5. What will be the output of the C#.NET code snippet given below?

      byte b1 = 0xAB;
      byte b2 = 0x99;
      byte temp; 
      temp = (byte)~b2; 
      Console.Write(temp + " "); 
      temp = (byte)(b1 " "); 
      temp = (byte) (b2 >> 2); 
      Console.WriteLine(temp);
    

  6. A.

    102 1 38

    B.

    108 0 32

    C.

    102 0 38

    D.

    1 0 1

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  7. Which of the following statements is correct about Bitwise | operator used in C#.NET?

  8. A.
    The | operator can be used to put OFF a bit.
    B.
    The | operator can be used to Invert a bit.
    C.
    The | operator can be used to check whether a bit is ON.
    D.
    The | operator can be used to check whether a bit is OFF.
    E.
    The | operator can be used to put ON a bit.

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  9. Which of the following is NOT an Assignment operator in C#.NET?

  10. A.
    \=
    B.
    /=
    C.
    *=
    D.
    +=
    E.
    %=

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  11. What will be the output of the C#.NET code snippet given below?

     int i, j = 1, k; 
     for (i = 0; i 5; i++)
     {   
         k = j++ + ++j;  
         Console.Write(k + " "); 
     }
    

  12. A.

    8 4 16 12 20

    B.

    4 8 12 16 20

    C.

    4 8 16 32 64

    D.

    2 4 6 8 10

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  13. What will be the output of the C#.NET code snippet given below?

     int a = 10, b = 20, c = 30; 
     int res = a 
     Console.WriteLine(res);

     

  14. A.

    10

    B.

    20

    C.

    30

    D.

    Compile Error / Syntax Error

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  15. Which of the following statements are correct about the following code snippet?

      int a = 10;
      int b = 20;
      bool c; 
      c = !(a > b);
    1. There is no error in the code snippet.
    2. An error will be reported since ! can work only with an int.
    3. A value 1 will be assigned to c.
    4. A value True will be assigned to c.
    5. A value False will be assigned to c.

     

  16. A.

    1, 3

    B.

    2, 4

    C.

    4, 5

    D.

    1, 4

    E.

    None of these

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  17. Which of the following statements is correct about Bitwise ^ operator used in C#.NET?

  18. A.
    The ^ operator can be used to put ON a bit.
    B.
    The ^ operator can be used to put OFF a bit.
    C.
    The ^ operator can be used to Invert a bit.
    D.
    The ^ operator can be used to check whether a bit is ON.
    E.
    The ^ operator can be used to check whether a bit is OFF.

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  19. Which of the following statements are correct?

    1. The conditional operator (?:) returns one of two values depending on the value of a Boolean expression.
    2. The as operator in C#.NET is used to perform conversions between compatible reference types.
    3. The &* operator is also used to declare pointer types and to dereference pointers.
    4. The -> operator combines pointer dereferencing and member access.
    5. In addition to being used to specify the order of operations in an expression, brackets [ ] are used to specify casts or type conversions.

  20. A.
    1, 2, 4
    B.
    2, 3, 5
    C.
    3, 4, 5
    D.
    1, 3, 5
    E.
    None of these

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