Storage Management Quiz Online Practice Test

1. The function ____ allocates memory dynamically.

2. What does **void \*malloc(size_t n)** return?

3. What does **calloc()** return in terms of initialization?

4. In the function **free(p)**, what type of variable is p?

5. What will be the result of executing the following C code?
#include <stdio.h>
void main()
{
char *p = calloc(100, 1);
p = "welcome";
printf("%s\n", p);
}

6. Memory allocation using **malloc()** occurs in _________.

7. Why do we cast **(int \*)** before calling **malloc()** in the following code?
int *ip = (int *)malloc(sizeof(int));

8. Which function is utilized for memory deallocation in C?

9. Which of the following data structures will provide the fastest result when searching for a specific key?

10. When dynamic memory is freed without modifying the pointer value, what does the pointer point to?

11. 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;
}

12. What will be the result of executing the following C code?
#include <stdio.h>
struct p
{
struct p *next;
int x;
};
int main()
{
struct p* p1 = malloc(sizeof(struct p));
p1->x = 1;
p1->next = malloc(sizeof(struct p));
printf("%d\n", p1->next->x);
return 0;
}

13. **calloc()** initializes the allocated memory with all bits set to zero.

14. What happens if the size is zero in the following C statement?
**realloc(ptr, size)**