250+ TOP MCQs on Increment and Decrement Operators and Answers [2024]

’s MCQs on C helps anyone preparing for placement in Capgemini and other companies. Anyone looking for Capgemini placement papers should practice these questions continuously for 2-3 months, thereby ensuring a top position in placements.

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

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int i = 0;
```
```
        int x = i++, y = ++i;
```
```
        printf("%d % dn", x, y);
```
```
        return 0;
```
```
    }
```

a) 0, 2
b) 0, 1
c) 1, 2
d) Undefined
Answer: a
Clarification: None.

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

```
    #include 
```
```
    int main()
```
```
    {
```
```
        int i = 10;
```
```
        int *p = &i;
```
```
        printf("%dn", *p++);
```
```
    }
```

a) 10
b) 11
c) Garbage value
d) Address of i
Answer: a
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int x = 97;
```
```
        int y = sizeof(x++);
```
```
        printf("X is %d", x);
```
```
    }
```

a) X is 97
b) X is 98
c) X is 99
d) Run time error
Answer: a
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int x = 4, y, z;
```
```
        y = --x;
```
```
        z = x--;
```
```
        printf("%d%d%d", x,  y, z);
```
```
    }
```

a) 3 2 3
b) 2 3 3
c) 3 2 2
d) 2 3 4
Answer: b
Clarification: None.

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

```
    #include 
```
```
    void main()
```
```
    {
```
```
        int x = 4;
```
```
        int *p = &x;
```
```
        int *k = p++;
```
```
        int r = p - k;
```
```
        printf("%d", r);
```
```
    }
```

a) 4
b) 8
c) 1
d) Run time error
Answer: c
Clarification: None.

6. 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.

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

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

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

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