Pointers to Pointers Quiz Online Practice Test

1. What will be the output of this C code?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
printf("%d%d%d\n", k, *p, **m);
}

2. What will be the output of this C code?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
printf("%d%d%d\n", k, *p, **p);
}

3. What will be the result of executing this C code?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
**m = 6;
printf("%d\n", k);
}

4. What will be the output of this C code?
#include <stdio.h>
void main()
{
int a[3] = {1, 2, 3};
int *p = a;
int *r = &p;
printf("%d", (**r));
}

5. What output can be expected from this C code?
#include <stdio.h>
void main()
{
int a[3] = {1, 2, 3};
int *p = a;
int **r = &p;
printf("%p %p", *r, a);
}

6. What is the maximum number of asterisk (*) symbols allowed in a pointer variable declaration in C?

7. What will the result be when executing this C code?
#include <stdio.h>
int main()
{
int a = 1, b = 2, c = 3;
int *ptr1 = &a, *ptr2 = &b, *ptr3 = &c;
int **sptr = &ptr1; // Reference
*sptr = ptr2;
}

8. What output will this C code produce?
#include <stdio.h>
void main()
{
int a[3] = {1, 2, 3};
int *p = a;
int **r = &p;
printf("%p %p", *r, a);
}

9. What modification is needed at //-Ref to make `ptr1` point to variable `c` in this C code?
#include <stdio.h>
int main()
{
int a = 1, b = 2, c = 3;
int *ptr1 = &a;
int **sptr = &ptr1;
//-Ref
}

10. Which of the following declarations will cause a run-time error?

11. Analyze the output of this C code:
#include <stdio.h>
int main()
{
int a = 10;
int **c -= &&a;
}

12. What will the output be from executing this C code?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
printf("%d%d%d\n", k, *p, **m);
}

13. What output will this C code produce when executed?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
printf("%d%d%d\n", k, *p, **p);
}

14. What will be the result when this C code is executed?
#include <stdio.h>
void main()
{
int k = 5;
int *p = &k;
int **m = &p;
**m = 6;
printf("%d\n", k);
}

15. What will the following C program print when executed?
#include <stdio.h>
void main()
{
int a[3] = {1, 2, 3};
int *p = a;
int *r = &p;
printf("%d", (**r));
}