Random Number Generation - C Programming Questions and Answers

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Random Number Generation – 2”.

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

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

```
    #include <stdio.h>
```
```
    #include <stdlib.h>
```
```
    int main()
```
```
    {
```
```
        printf("%d\n", rand() % 1000);
```
```
        return 0;
```
```
    }
```

a) Compile time error
b) An integer between 0-1000
c) An integer between 0-999 including 0 and 999
d) An integer between 0-1000 including 1000
View Answer

Answer: c
Explanation: None.

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

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```
    #include <stdio.h>
```
```
    #include <stdlib.h>
```
```
    int main()
```
```
    {
```
```
        srand(9000);
```
```
        printf("%d\n", rand());
```
```
        return 0;
```
```
    }
```

a) Compile time error
b) An integer in the range 0 to RAND_MAX
c) A double in the range 0 to 1
d) A float in the range 0 to 1
View Answer

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        printf("%d\n", srand(9000));
```
```
        return 0;
```
```
    }
```

a) Compile time error
b) An integer in the range 0 to 9000
c) A float in the range 0 to 1
d) A double in the range 0 to 9000
View Answer

Answer: a
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        srand(time(NULL));
```
```
        printf("%d\n", rand());
```
```
        return 0;
```
```
    }
```

a) Compile time error
b) An integer in the range 0 to RAND_MAX
c) A double in the range 0 to 1
d) A float in the range 0 to 1
View Answer

Answer: b
Explanation: None.

5. In the below C program, every time program is run different numbers are generated.

```
    #include <stdio.h>
```
```
    #include <stdlib.h>
```
```
    int main()
```
```
    {
```
```
        printf("%d\n", rand());
```
```
        return 0;
```
```
    }
```

a) True
b) False
c) Depends on the platform
d) Depends on the compiler
View Answer

Answer: b
Explanation: None.

6. In the following C program, every time program is run different numbers are generated.

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        srand(time(NULL));
```
```
        printf("%d\n", rand());
```
```
        return 0;
```
```
    }
```

a) True
b) False
c) Depends on the platform
d) Depends on the compiler
View Answer

Answer: a
Explanation: None.

7. Which of these is a correct way to generate numbers between 0 to 1(inclusive) randomly?
a) rand() / RAND_MAX
b) rand() % 2
c) rand(0, 1)
d) none of the mentioned
View Answer

Answer: a
Explanation: None.

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