Address Arithmetic Quiz Online Practice Test

1. What will be the output of the following C code?
#include <stdio.h>
int main()
{
double *ptr = (double *)100;
ptr = ptr + 2;
printf("%u", ptr);
}

2. What will be the output of the following C code?
#include <stdio.h>
int main()
{
int *p = (int *)2;
int *q = (int *)3;
printf("%d", p + q);
}

3. Which of the following arithmetic operations can be performed on pointers `a` and `b`, given the initialization `int *a = (int *)2; int *b = (int *)3;`?

4. What is the size of `*ptr` on a 32-bit machine, given the initialization `int *ptr = 10;`?

5. Which of the following operations can be performed on pointers, considering the initialization `int *a = (int *)2; int *b = (int *)3;`?

6. What will be the output of the following C code?
#include <stdio.h>
void main()
{
char *s = "hello";
char *p = s;
printf("%c\t%c", *(p + 1), s[1]);
}

7. What will be the output of the following C code?
#include <stdio.h>
void main()
{
char *s = "hello";
char *p = s;
printf("%c\t%c", *p, s[1]);
}

8. What will be the output of the following C code?
#include <stdio.h>
void main()
{
char *s = "hello";
char *n = "cjn";
char *p = s + n; // Note: This line contains an error
printf("%c\t%c", *p, s[1]);
}

9. What will be the output of the following C code snippet?
#include <stdio.h>
void main()
{
char *s = "hello";
char *p = s + 2;
printf("%c\t%c", *p, s[1]);
}

10. What will be the output of the following C code?
#include <stdio.h>
int main()
{
void *p;
int a[4] = {1, 2, 3, 8};
p = &a[3];
int *ptr = &a[2];
int n = p - ptr; // This line has an issue
printf("%d\n", n);
}

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

12. What will be the output of this C code snippet?
#include <stdio.h>
int main()
{
int a[4] = {1, 2, 3, 4};
int b[4] = {1, 2, 3, 4};
int n = &b[3] - &a[2];
printf("%d\n", n);
}

13. What will be the output of this C code snippet?
#include <stdio.h>
int main()
{
int a[4] = {1, 2, 3, 4};
int *p = &a[1];
int *ptr = &a[2];
ptr = ptr * 1; // This line contains an error
printf("%d\n", *ptr);
}

14. What will be the output of this C code snippet?
#include <stdio.h>
int main()
{
int a[4] = {1, 2, 3, 4};
int *ptr = &a[2];
float n = 1;
ptr = ptr + n; // This line contains an issue
printf("%d\n", *ptr);
}

15. What will be the output of this C code snippet?
#include <stdio.h>
int main()
{
int a[4] = {1, 2, 3, 4};
void *p = &a[1];
void *ptr = &a[2];
int n = 1;
n = ptr - p; // This line will cause an error
printf("%d\n", n);
}