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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 18 of 27

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Q171.
What will be the output of the program ?
#include<stdio.h>

int main()
{
    struct byte
    {
        int one:1;
    };
    struct byte var = {1};
    printf("%d\n", var.one);
    return 0;
}
Discuss
Answer: (b).-1
Q172.
What will be the output of the program ?
#include<stdio.h>

int main()
{
    enum days {MON=-1, TUE, WED=6, THU, FRI, SAT};
    printf("%d, %d, %d, %d, %d, %d\n", ++MON, TUE, WED, THU, FRI, SAT);
    return 0;
}
Discuss
Answer: (b).Error
Q173.
What will be the output of the program ?
#include<stdio.h>

    struct course
    {
        int courseno;
        char coursename[25];
    };
int main()
{
    struct course c[] = { {102, "Java"}, 
                          {103, "PHP"}, 
                          {104, "DotNet"}     };

    printf("%d ", c[1].courseno);
    printf("%s\n", (*(c+2)).coursename);
    return 0;
}
Discuss
Answer: (a).103 DotNet
Q174.
What will be the output of the program given below in 16-bit platform ?
#include<stdio.h>

int main()
{
    enum value{VAL1=0, VAL2, VAL3, VAL4, VAL5} var;
    printf("%d\n", sizeof(var));
    return 0;
}

a.

1

b.

2

c.

4

d.

10

Discuss
Answer: (b).2
Q175.
Point out the error in the program?
struct emp
{
    int ecode;
    struct emp *e;
};
Discuss
Answer: (c).No Error
Q176.
Point out the error in the program?
typedef struct data mystruct;
struct data
{
    int x;
    mystruct *b;
};
Discuss
Answer: (c).No Error
Q177.
Point out the error in the program?
#include<stdio.h>

int main()
{
    struct a
    {
        float category:5;
        char scheme:4;
    };
    printf("size=%d", sizeof(struct a));
    return 0;
}
Discuss
Answer: (b).Error in this float category:5; statement
Q178.
Point out the error in the program?
struct emp
{
    int ecode;
    struct emp e;
};
Discuss
Answer: (a).Error: in structure declaration
Q179.
Point out the error in the program?
#include<stdio.h>

int main()
{
    struct emp
    {
        char name[20];
        float sal;
    };
    struct emp e[10];
    int i;
    for(i=0; i<=9; i++)
        scanf("%s %f", e[i].name, &e[i].sal);
    return 0;
}
Discuss
Answer: (b).Error: Floating point formats not linked
Q180.
Point out the error in the program?
#include<stdio.h>
#include<string.h>
void modify(struct emp*);
struct emp
{
    char name[20];
    int age;
};
int main()
{
    struct emp e = {"Sanjay", 35};
    modify(&e);
    printf("%s %d", e.name, e.age);
    return 0;
}
void modify(struct emp *p)
{
     p ->age=p->age+2;
}
Discuss
Answer: (b).Error: in prototype declaration unknown struct emp

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