Pointer MCQs

What will be the output of the following C code?

#include <stdio.h>
int sub(int a, int b, int c)
{
    return a - b - c;
}
void main()
{
    int (*function_pointer)(int, int, int);
    function_pointer = ⊂
    printf("The difference of three numbers is:%d",
    (*function_pointer)(2, 3, 4));
}

Which of the following declaration will result in run-time error?

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *a[2] = {"hello", "hi"};
    printf("%s", *(a + 1));
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    int k = 5;
    int *p = &k
    int **m  = &p
    **m = 6;
    printf("%d\n", k);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    char *p = NULL;
    char *q = 0;
    if (p)
        printf(" p ");
    else
        printf("nullp");
    if (q)
        printf("q\n");
    else
        printf(" nullq\n");
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 97, *p = &i
    foo(&i);
    printf("%d ", *p);
}
void foo(int *p)
{
    int j = 2;
    p = &j
    printf("%d ", *p);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int ary[2][3][4], j = 20;
    ary[0][0] = &j
    printf("%d\n", *ary[0][0]);
}

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);
}

What will be the output of the following 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);
}