Operators

Q1:
Which of the following statements is correct about the C#.NET code snippet given below?
int d; 
d = Convert.ToInt32( !(30 < 20) );

A A value 0 will be assigned to d.

B A value 1 will be assigned to d.

C A value -1 will be assigned to d.

D The code reports an error.

E The code snippet will work correctly if ! is replaced by Not.

Q2:
Which of the following are NOT Relational operators in C#.NET?
  1. >=
  2. !=
  3. Not
  4. <=
  5. <>=

A 1, 3

B 2, 4

C 3, 5

D 4, 5

E None of these

Q3: 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?

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");

Q4: Which of the following is NOT a Bitwise operator in C#.NET?

A &

B |

C <<

D ^

E ~

Q5:
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.

A 1, 2, 4

B 2, 3, 5

C 3, 4, 5

D 1, 3, 5

E None of these

Q6:
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.

A 1, 3

B 2, 4

C 4, 5

D 1, 4

E None of these

Q7: Which of the following is NOT an Assignment operator in C#.NET?

A \=

B /=

C *=

D +=

E %=

Q8: Which of the following statements is correct about Bitwise | operator used in C#.NET?

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.

Q9:
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 + ' ');
}

A 8 4 16 12 20

B 4 8 12 16 20

C 4 8 16 32 64

D 2 4 6 8 10

Q10:
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);

A 163 92

B 92 163

C 192 63

D 0 1

Q11: Which of the following statements is correct about Bitwise ^ operator used in C#.NET?

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.

Q12: 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?

A n = n && HF7

B n = n & 16

C n = n & 0xF7

D n = n & HexF7

E n = n & 8

Q13:
Which of the following are Logical operators in C#.NET?
  1. &&
  2. ||
  3. !
  4. Xor
  5. %

A 1, 2, 3

B 1, 3, 4

C 2, 4, 5

D 3, 4, 5

E None of these

Q14:
Which of the following is the correct output for the C#.NET code snippet given below?
Console.WriteLine(13 / 2 + ' ' + 13 % 2); 

A 6.5 1

B 6.5 0

C 6 0

D 6 1

E 6.5 6.5

Q15:
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.

A 1, 2, 4

B 2, 3, 5

C 3, 4

D 3, 4, 5

E None of these

Q16:
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);

A 102 1 38

B 108 0 32

C 102 0 38

D 1 0 1

Q17:
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;

A 1, 3

B 2, 4

C 3, 5

D 4, 5

E None of these

Q18: Which of the following is NOT an Arithmetic operator in C#.NET?

A **

B +

C /

D %

E *

Q19:
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 ); 

A 5 6

B 6 5

C 6 6

D 7 7

Q20:
What will be the output of the C#.NET code snippet given below?
int a = 10, b = 20, c = 30; 
int res = a < b ? a < c ? c : a : b; 
Console.WriteLine(res);

A 10

B 20

C 30

D Compile Error / Syntax Error


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