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  • Question
  • Suppose n is a variable of the type Byte and we wish, to check whether its fourth bit (from right) is ON or OFF. Which of the following statements will do this correctly?


  • Options
  • A.
    if ((n&16) == 16)
    Console.WriteLine("Fourth bit is ON");
  • B.
    if ((n&8) == 8)
    Console.WriteLine("Fourth bit is ON");
  • C.
    if ((n ! 8) == 8)
    Console.WriteLine("Fourth bit is ON");
  • D.
    if ((n ^ 8) == 8)
    Console.WriteLine("Fourth bit is ON");
  • E.
    if ((n ~ 8) == 8)
    Console. WriteLine("Fourth bit is ON");

  • Correct Answer
  • if ((n&8) == 8)
    Console.WriteLine("Fourth bit is ON");
     

    Explanation
    byte myByte = 153; // In Binary = 10011001
    
    byte n = 8; // In Binary = 00001000 
    (Here 1 is the 4th bit from right)
    
    Now perform logical AND operation (n & myByte)
    
     10011001
     00001000
    ---------
     00001000  Here result is other than 0, so evaluated to True.
    ---------
    If the result is true, then we can understand that 4th bit is ON of the given data myByte.

    Operators problems


    Search Results


    • 1. Which of the following are the correct ways to increment the value of variable a by 1?

      1. ++a++;
      2. a += 1;
      3. a ++ 1;
      4. a = a +1;
      5. a = +1;

    • Options
    • A. 1, 3
    • B. 2, 4
    • C. 3, 5
    • D. 4, 5
    • E. None of these
    • Discuss
    • 2. 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?

    • Options
    • A. n = n && HF7
    • B. n = n & 16
    • C. n = n & 0xF7
    • D. n = n & HexF7
    • E. n = n & 8
    • Discuss
    • 3. Which of the following is NOT an Assignment operator in C#.NET?

    • Options
    • A. \=
    • B. /=
    • C. *=
    • D. +=
    • E. %=
    • Discuss
    • 4. Which of the following is NOT a Bitwise operator in C#.NET?

    • Options
    • A. &
    • B. |
    • C. <<
    • D. ^
    • E. ~
    • Discuss
    • 5. 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 ); 

    • Options
    • A. 5 6
    • B. 6 5
    • C. 6 6
    • D. 7 7
    • Discuss
    • 6. What will be the output of the C#.NET code snippet given below?

      byte b1 = 0xF7;
      byte b2 = 0xAB;
      byte temp;
      temp = (byte)(b1 & b2);
      Console.Write (temp + " ");
      temp = (byte)(b1^b2);
      Console.WriteLine(temp);

    • Options
    • A. 163 92
    • B. 92 163
    • C. 192 63
    • D. 0 1
    • Discuss
    • 7. Which of the following are Logical operators in C#.NET?

      1. &&
      2. ||
      3. !
      4. Xor
      5. %

    • Options
    • A. 1, 2, 3
    • B. 1, 3, 4
    • C. 2, 4, 5
    • D. 3, 4, 5
    • E. None of these
    • Discuss
    • 8. 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.

    • Options
    • A. 1, 3
    • B. 2, 4
    • C. 4, 5
    • D. 1, 4
    • E. None of these
    • Discuss
    • 9. Which of the following statements are correct about the Bitwise & operator used in C#.NET?

      1. The & operator can be used to Invert a bit.
      2. The & operator can be used to put ON a bit.
      3. The & operator can be used to put OFF a bit.
      4. The & operator can be used to check whether a bit is ON.
      5. The & operator can be used to check whether a bit is OFF.

    • Options
    • A. 1, 2, 4
    • B. 2, 3, 5
    • C. 3, 4
    • D. 3, 4, 5
    • E. None of these
    • Discuss
    • 10. 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 << b2);
      Console.Write (temp + " ");
      temp = (byte) (b2 >> 2);
      Console.WriteLine(temp);

    • Options
    • A. 102 1 38
    • B. 108 0 32
    • C. 102 0 38
    • D. 1 0 1
    • Discuss


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