C Mathematical Functions Questions and Answers

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Mathematical Functions – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

1. Which of the following mathematical function requires 2 parameter for successful function call?
a) fmod();
b) div();
c) atan2();
d) all of the mentioned
View Answer

Answer: d
Explanation: None.

2. Which mathematical function among the following does NOT require int parameters?
a) div(x, y);
b) srand(x);
c) sqrt(x);
d) all of the mentioned
View Answer

Answer: c
Explanation: None.

3. What will sin(x) returns?
a) sine of x where x is in radians
b) sine of x where x is in degree
c) cosine of x where x is in radians
d) cosine of x where x is in degree
View Answer

Answer: a
Explanation: None.

4. What will cos(x) return?
a) sine of x where x is in radians
b) sine of x where x is in degree
c) cosine of x where x is in radians
d) cosine of x where x is in degree
View Answer

Answer: c
Explanation: None.

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

```
    #include <stdio.h>
```
```
    #include <math.h>
```
```
    void main()
```
```
    {
```
```
        int k = pow(2, 3);
```
```
        printf("%d\n", k);
```
```
    }
```

a) 9
b) 8
c) -1
d) 6
View Answer

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    #include <math.h>
```
```
    void main()
```
```
    {
```
```
        int k = fabs(-87);
```
```
        printf("%d\n", k);
```
```
    }
```

a) -87
b) 87
c) 78
d) error
View Answer

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    #include <math.h>
```
```
    void main()
```
```
    {
```
```
        int k = sqrt(-4);
```
```
        printf("%d\n", k);
```
```
    }
```

a) -2
b) 2
c) Compile time error
d) NaN
View Answer

Answer: d
Explanation: None.

8. Which among the following mathematical function do not have a “double” return-type?
a) srand(x);
b) ceil(x);
c) floor(x);
d) both ceil(x); and floor(x);
View Answer

Answer: a
Explanation: None.

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