250+ TOP MCQs on Bitwise Operators and Answers [2024]

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Here is a listing of C questions on “Bitwise Operators” along with answers, explanations and/or solutions:

1. What will be the output of the following C code?

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int a = 5, b = -7, c = 0, d;
```
```
        d = ++a && ++b || ++c;
```

        printf("n%d%d%d%d", a, b, c, d);

```
    }
```

a) 6 -6 0 0
b) 6 -5 0 1
c) -6 -6 0 1
d) 6 -6 0 1
Answer: d
Clarification: None.

2. What will be the output of the following C code?

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int a = -5;
```
```
        int k = (a++, ++a);
```
```
        printf("%dn", k);
```
```
    }
```

a) -3
b) -5
c) 4
d) Undefined
Answer: a
Clarification: None.

3. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int x = 2;
```
```
        x = x << 1;
```
```
        printf("%dn", x);
```
```
    }
```

a) 4
b) 1
c) Depends on the compiler
d) Depends on the endianness of the machine
Answer: a
Clarification: None.

4. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int x = -2;
```
```
        x = x >> 1;
```
```
        printf("%dn", x);
```
```
    }
```

a) 1
b) -1
c) 2 ³¹ – 1 considering int to be 4 bytes
d) Either -1 or 1
Answer: b
Clarification: None.

5. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        if (~0 == 1)
```
```
            printf("yesn");
```
```
        else
```
```
            printf("non");
```
```
    }
```

a) yes
b) no
c) compile time error
d) undefined
Answer: b
Clarification: None.

6. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int x = -2;
```
```
        if (!0 == 1)
```
```
            printf("yesn");
```
```
        else
```
```
            printf("non");
```
```
    }
```

a) yes
b) no
c) run time error
d) undefined
Answer: a
Clarification: None.

7. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int y = 0;
```
```
        if (1 |(y = 1))
```
```
            printf("y is %dn", y);
```
```
        else
```
```
            printf("%dn", y);
```
```
 
```
```
    }
```

a) y is 1
b) 1
c) run time error
d) undefined
Answer: a
Clarification: None.

8. What will be the output of the following C code?

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int y = 1;
```
```
        if (y & (y = 2))
```
```
            printf("true %dn", y);
```
```
        else
```
```
            printf("false %dn", y);
```
```
 
```
```
    }
```

a) true 2
b) false 2
c) either true 2 or false 2
d) true 1
Answer: a
Clarification: None.

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