11. What is function srand(unsigned)?
12. What is the purpose of the C function?
int ferror(FILE *fp)
int ferror(FILE *fp)13. What if size is zero in the following C statement?
realloc(ptr, size)
realloc(ptr, size)14. Select the right explanation to the given code.
printf(“%*. *f”, 5,4,5700);
printf(“%*. *f”, 5,4,5700);15. Which of the following should be used for freeing the memory allocated in the following C code?
#include <stdio.h>
struct p
{
struct p *next;
int x;
};
int main()
{
struct p *p1 = (struct p*)malloc(sizeof(struct p));
p1->x = 1;
p1->next = (struct p*)malloc(sizeof(struct p));
return 0;
}
#include <stdio.h>
struct p
{
struct p *next;
int x;
};
int main()
{
struct p *p1 = (struct p*)malloc(sizeof(struct p));
p1->x = 1;
p1->next = (struct p*)malloc(sizeof(struct p));
return 0;
}16. Which of the following function with ellipsis are illegal?
17. What will be the output of the following C code?
#include <stdio.h>
struct p
{
struct p *next;
int x;
};
int main()
{
struct p *p1 = calloc(1, sizeof(struct p));
p1->x = 1;
p1->next = calloc(1, sizeof(struct p));
printf("%d\n", p1->next->x);
return 0;
}
#include <stdio.h>
struct p
{
struct p *next;
int x;
};
int main()
{
struct p *p1 = calloc(1, sizeof(struct p));
p1->x = 1;
p1->next = calloc(1, sizeof(struct p));
printf("%d\n", p1->next->x);
return 0;
}18. Which of the following mathematical function requires 2 parameter for successful function call?
19. How many characters for pushback is guaranteed per file while using ungetc(c, fp);?
20. Which of the following function can be used to terminate the main() function from another function safely?
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