Structure and Union - C Programming MCQ Questions and Answers

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51.
What will be the output of the following C code?
#include <stdio.h>
struct p
{
    int x[2];
};
struct q
{
    int *x;
};
int main()
{
    struct p p1 = {1, 2};
    struct q *ptr1;
    ptr1->x = (struct q*)&p1.x;
    printf("%d\n", ptr1->x[1]);
}

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52.
What will be the output of the following C code?
#include <stdio.h>
union p
{
    int x;
    char y;
}k = {.y = 97};
int main()
{
    printf("%d\n", k.y);
}

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53.
What will be the output of the following C code?
#include <stdio.h>
struct student
{
    char *name;
};
void main()
{
    struct student s, m;
    s.name = "st";
    m = s;
    printf("%s%s", s.name, m.name);
}

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54.
What will be the output of the following C code?
#include <stdio.h>
struct student
{
    char *name;
};
struct student s[2], r[2];
void main()
{
    s[0].name = "alan";
    s[1] = s[0];
    r = s;
    printf("%s%s", r[0].name, r[1].name);
}

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55.
What will be the output of the following C code?
#include <stdio.h>
struct point
{
    int x;
    int y;
};
void foo(struct point*);
int main()
{
    struct point p1[] = {1, 2, 3, 4, 5};
    foo(p1);
}
void foo(struct point p[])
{
    printf("%d %d\n", p->x, p[3].y);
}

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56.
What will be the output of the following C code?
#include <stdio.h>
void main()
{
    char *a[3][3] = {{"hey", "hi", "hello"}, {"his", "her", "hell"}
    , {"hellos", "hi's", "hmm"}};
    printf("%s", a[1][1]);
}

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57.
What will be the output of the following C code?
#include <stdio.h>
union u
{
    struct
    {
        unsigned char x : 2;
        unsigned int y : 2;
    }p;
    int x;
};
int main()
{
    union u u = {2};
    printf("%d\n", u.p.x);
}

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58.
What will be the output of the following C code?
#include <stdio.h>
struct p
{
    int k;
    char c;
};
int p = 10;
int main()
{
    struct p x;
    x.k = 10;
    printf("%d %d\n", x.k, p);
}

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59.
What will be the output of the following C code?
#include <stdio.h>
struct p
{
    char *name;
    struct p *next;
};
struct p *ptrary[10];
int main()
{
    struct p p;
    p.name = "xyz";
    p.next = NULL;
    ptrary[0] = &p;
    printf("%s\n", ptrary[0]->name);
    return 0;
}

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60.
What will be the output of the following C code?
#include <stdio.h>
struct p
{
    char *name;
    struct p *next;
};
struct p *ptrary[10];
int main()
{
    struct p p;
    p->name = "xyz";
    p->next = NULL;
    ptrary[0] = &p;
    printf("%s\n", p->name);
    return 0;
}

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