Structure and Union MCQs

What will be the output of the following C code?

#include <stdio.h>
struct p
{
    int x;
    char y;
    struct p *ptr;
};
int main()
{
    struct p p = {1, 2, &p};
    printf("%d\n", p.ptr->x);
    return 0;
}

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    char *c;
};
void main()
{
    struct student m;
    struct student *s = &m
    s->c = "hello";
    printf("%s", s->c);
}

Comment on the output of the following C code.

#include <stdio.h>
struct temp
{
    int a;
    int b;
    int c;
};
main()
{
    struct temp p[] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
}

Which of the following operation is illegal in structures?

The correct syntax to access the member of the ith structure in the array of structures is?

Assuming: struct temp
    {
        int b;
    }s[50];

What will be the output of the following C code?

#include <stdio.h>
struct p
{
    int x;
    char y;
};
int main()
{
    struct p p1[] = {1, 92, 3, 94, 5, 96};
    struct p *ptr1 = p1;
    int x = (sizeof(p1) / sizeof(ptr1));
    if (x == 1)
        printf("%d\n", ptr1->x);
    else
        printf("false\n");
}

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    char *c;
    struct student *point;
};
void main()
{
    struct student s;
    struct student m;
    m.point = s;
    (m.point)->c = "hey";
    printf("%s", s.c);
}

What will be the output of the following C code?

#include <stdio.h>
union stu
{
    int ival;
    float fval;
};
void main()
{
    union stu r;
    r.ival = 5;
    printf("%d", r.ival);
}

What will be the output of the following C code?

#include <stdio.h>
union
{
    int x;
    char y;
}p;
int main()
{
    p.y = 60;
    printf("%d\n", sizeof(p));
}