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Welcome to the Structures and Unions MCQs Page

Dive deep into the fascinating world of Structures and Unions with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Structures and Unions, a crucial aspect of C Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Structures and Unions, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C Programming.

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Check out the MCQs below to embark on an enriching journey through Structures and Unions. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C Programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Structures and Unions. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Structures and Unions MCQs | Page 4 of 27

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Q31.
What is the output of this C code?
#include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    struct notpoint
    {
        int x;
        int y;
    };
    void foo(struct point);
    int main()
    {
        struct notpoint p1 = {1, 2};
        foo(p1);
    }
    void foo(struct point p)
    {
        printf("%d\n", p.x);
    }
Discuss
Answer: (a).Compile time error
Q32.
What is the output of this C code?
#include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    void foo(struct point*);
    int main()
    {
        struct point p1 = {1, 2};
        foo(&p1);
    }
    void foo(struct point *p)
    {
        printf("%d\n", *p.x++);
    }
Discuss
Answer: (a).Compile time error
Q33.
What is the output of this C code?
#include <stdio.h>
    struct point
    {
        int x;
        int y;
    };
    void foo(struct point*);
    int main()
    {
        struct point p1 = {1, 2};
        foo(&p1);
    }
    void foo(struct point *p)
    {
        printf("%d\n", *p->x++);
    }
Discuss
Answer: (a).Compile time error
Q34.
What is the output of this C code?
#include <stdio.h>
    struct student fun(void)
    {
        struct student
        {
            char *name;
        };
        struct student s;
        s.name = "alan";
        return s;
    }
    void main()
    {
        struct student m = fun();
        printf("%s", m.name);
    }
Discuss
Answer: (a).Compile time error
Q35.
What is the output of this C code?
#include <stdio.h>
    struct student
    {
        char *name;
    };
    struct student fun(void)
    {
        struct student s;
        s.name = "alan";
        return s;
    }
    void main()
    {
        struct student m = fun();
        printf("%s", m.name);
    }
Discuss
Answer: (b).alan
Q36.
The correct syntax to access the member of the ith structure in the array of structures is?
Assuming: struct temp
    {
        int b;
    }s[50];
Discuss
Answer: (d).s[i].b;
Discuss
Answer: (a).No Compile time error, generates an array of structure of size 3
Q38.
Which of the following uses structure?
Discuss
Answer: (d).All of the mentioned
Q39.
What is the correct syntax to declare a function foo() which receives an array of structure in function?
Discuss
Answer: (a).void foo(struct *var);
Q40.
What is the output of this C code?
(Assuming size of int be 4)
#include <stdio.h>
    struct temp
    {
        int a;
        int b;
        int c;
    } p[] = {0};
    main()
    {
        printf("%d", sizeof(p));
    }
Discuss
Answer: (b).12

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