Pointers and Function Arguments Quiz Online Practice Test

1. What is the output of this C code?
#include <stdio.h>
void foo(int*);
int main()
{
int i = 10;
foo((&i)++);
}
void foo(int *p)
{
printf("%d\n", *p);
}

2. What is the output of this C code?
#include <stdio.h>
void foo(int*);
int main()
{
int i = 10, *p = &i;
foo(p++);
}
void foo(int *p)
{
printf("%d\n", *p);
}

3. What is the output of this C code?
#include <stdio.h>
void foo(float*);
int main()
{
int i = 10, *p = &i;
foo(&i);
}
void foo(float *p)
{
printf("%f\n", *p);
}

4. What is the output of this C code?
#include <stdio.h>
void foo(int *p);
int main()
{
int i = 97, *p = &i;
foo(&i);
printf("%d ", *p);
}
void foo(int *p)
{
int j = 2;
p = &j;
printf("%d ", *p);
}

5. What will be the output of this C code?
#include <stdio.h>
int main()
{
int i = 97, *p = &i;
foo(&p);
printf("%d ", *p);
return 0;
}
void foo(int **p)
{
int j = 2;
*p = &j;
printf("%d ", **p);
}

6. What will be the output of this C code?
#include <stdio.h>
int main()
{
int i = 11;
int *p = &i;
foo(&p);
printf("%d ", *p);
}
void foo(int *const *p)
{
int j = 10;
*p = &j;
printf("%d ", **p);
}

7. What will be the output of this C code?
#include <stdio.h>
void foo(int *);
int main()
{
int i = 10;
int *p = &i;
foo(p);
printf("%d ", *p);
}
void foo(int *p)
{
int j = 11;
p = &j;
printf("%d ", *p);
}

8. What will be the output of this C code?
#include <stdio.h>
int main()
{
int i = 10;
int *const p = &i;
foo(&p);
printf("%d\n", *p);
}
void foo(int **p)
{
int j = 11;
*p = &j;
printf("%d\n", **p);
}

9. Which of the following correctly demonstrates how to pass an array to a function as a parameter?

10. Which of the following cannot be passed by value?

11. Which type of variables can share the same name in different functions?

12. What do we call arguments that require user input before executing a program?

13. What is the maximum number of arguments that can be passed to a single function in C?

14. What will be the output of the following C code?
#include <stdio.h>
void m(int *p, int *q)
{
int temp = *p; *p = *q; *q = temp;
}
void main()
{
int a = 6, b = 5;
m(&a, &b);
printf("%d %d\n", a, b);
}

15. What will be the output of the following C code?
#include <stdio.h>
void m(int *p)
{
int i = 0;
for(i = 0; i < 5; i++)
printf("%d\t", p[i]);
}
void main()
{
int a[5] = {6, 5, 3};
m(&a);
}

16. What will be the output of the following C code?
#include <stdio.h>
void m(int p, int q)
{
int temp = p;
p = q;
q = temp;
}
void main()
{
int a = 6, b = 5;
m(a, b);
printf("%d %d\n", a, b);
}

17. What will be the output of the following C code?
#include <stdio.h>
void m(int p, int q)
{
printf("%d %d\n", p, q);
}
void main()
{
int a = 6, b = 5;
m(a);
}

18. What will be the output of the following C code?
#include <stdio.h>
void m(int p)
{
printf("%d\n", p);
}
void main()
{
int a = 6, b = 5;
m(a, b);
printf("%d %d\n", a, b);
}