C Programming Questions and Answers – Random Number Generation

C Programming Questions and Answers – Random Number Generation

1.The function srand(unsigned)

a) Sets the seed for rand

b) Doesn’t exist

c) Is an error

d) None of the mentioned

2.Which is the best way to generate numbers between 0 to 99?

a) rand()-100

b) rand()%100

c) rand(100)

d) srand(100)

3.The correct way to generate numbers between minimum and maximum(inclusive) is _____________________.

a) minimum + (rand() % (maximum – minimum));

b) minimum + (rand() % (maximum – minimum + 1));

c) minimum * (rand() % (maximum – minimum))

d) minimum – (rand() % (maximum+minimum));

4.rand() and srand() functions are used

a) To find sqrt

b) For and operations

c) For or operations

d) To generate random numbers

5.What is the return type of rand() function?

a) short

b) int

c) long

d) double

6.Which of the following can be used for random number generation?

a) random()

b) rnd()

c) rndm()

d) None of the mentioned

7.Which of the following snippet will effectively generate random numbers?

a) rand();

b) rand(10);

c) rand(time(NULL));

d) All of the mentioned

8.Which among the following is correct function call for rand and random?

a) rand() and random();

b) rand() and random(1);

c) rand(1) and random(1);

d) rand(1) and random();

9.For the function call time(), what type of parameter is accepted?

a) int

b) int *

c) time_t

d) time_t *

10.What is the output of this 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

11.What is the output of this C code?

#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.

12.What is the output of this 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

13.What is the output of this 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.

14.In the below program everytime 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

15.In the below program everytime 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

16.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