Pointer MCQs

Which of the following declaration are illegal?

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int ary[4] = {1, 2, 3, 4};
    printf("%d\n", *ary);
}

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int a = 1, b = 2, c = 3;
    int *ptr1 = &a, *ptr2 = &b, *ptr3 = &c
    int **sptr = &ptr1 //-Ref
    *sptr = ptr2;
}

One of the uses for function pointers in C is . . . . . . . .

Comment on the following pointer declaration.

int *ptr, p;

What will be the output of the following C code?

#include <stdio.h>
void f(int);
void (*foo)() = f;
int main(int argc, char *argv[])
{
    foo(10);
    return 0;
}
void f(int i)
{
    printf("%d\n", i);
}

What will be the output of the following 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);
}

What will be the output of the following C code?

#include <stdio.h>
void (*(f)())(int, float);
typedef void (*(*x)())(int, float);
void foo(int i, float f);
int main()
{
    x p = f;
    p();
}
void (*(f)())(int, float)
{
    return foo;
}
void foo(int i, float f)
{
    printf("%d %f\n", i, f);
}

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    struct student
    {
        int no;
        char name[20];
    };
    struct student s;
    s.no = 8;
    printf("%d", s.no);
}