Structure and Union - C Programming MCQ Questions and Answers Page-2 section-2

11.

What will be the output of the following C code?

#include <stdio.h>
union p
{
    int x;
    char y;
};
int main()
{
    union p p, b;
    p.y = 60;
    b.x = 12;
    printf("%d\n", p.y);
}

A. Compile time error

B. Depends on the compiler

C. 60

D. Undefined behaviour

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12.

What will be the output of the following C code?

#include <stdio.h>
struct p
{
    int k;
    char c;
    float f;
};
int p = 10;
int main()
{
    struct p x = {1, 97};
    printf("%f %d\n", x.f, p);
}

A. Compile time error

B. 0.000000 10

C. Somegarbage value 10

D. 0 10

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13.
Which of the following structure declaration will throw an error?

A. struct temp{}s;
main(){}

B. struct temp{};
struct temp s;
main(){}

C. struct temp s;
struct temp{};
main(){}

D. None of the mentioned

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14.

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;
    u.p.x = 2;
    printf("%d\n", u.p.x);
}

A. Compile time error

B. 2

C. Undefined behaviour

D. Depends on the standard

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15.

What will be the output of the following C code?

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

A. Compile time error

B. Nothing

C. hello

D. Varies

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16.
Which of the following is false about typedef?

A. typedef follow scope rules

B. typedef defined substitutes can be redefined again. (Eg: typedef char a; typedef int a;)

C. You cannot typedef a typedef with other term

D. All of the mentioned

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17.
Which function is responsible for recording the name "s" and the replacement text "t" in a table?

A. install(s, t);

B. fix(s, t);

C. setup(s, t);

D. settle(s, t);

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18.

The number of distinct nodes the following struct declaration can point to is . . . . . . . .

struct node
{
    struct node *left;
    struct node *centre;
    struct node *right;
};

A. 1

B. 2

C. 3

D. All of the mentioned

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19.

In the following declaration of bit-fields, the constant-expression specifies . . . . . . . .

struct-declarator:
declarator
type-specifier declarator opt : constant-expression

A. The width of the field in bits

B. Nothing

C. The width of the field in bytes

D. Error

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20.

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    char *c;
};
void main()
{
    struct student s[2];
    printf("%d", sizeof(s));
}

A. 2

B. 4

C. 16

D. 8

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11.
What will be the output of the following C code?

`#include <stdio.h> union p { int x; char y; }; int main() { union p p, b; p.y = 60; b.x = 12; printf("%d\n", p.y); }`

Answer & Solution

12.
What will be the output of the following C code?

`#include <stdio.h> struct p { int k; char c; float f; }; int p = 10; int main() { struct p x = {1, 97}; printf("%f %d\n", x.f, p); }`

Answer & Solution

13.
Which of the following structure declaration will throw an error?

Answer & Solution

14.
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; u.p.x = 2; printf("%d\n", u.p.x); }`

Answer & Solution

15.
What will be the output of the following C code?

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

Answer & Solution

16.
Which of the following is false about typedef?

Answer & Solution

17.
Which function is responsible for recording the name "s" and the replacement text "t" in a table?

Answer & Solution

18.
The number of distinct nodes the following struct declaration can point to is . . . . . . . .

`struct node { struct node left; struct node centre; struct node *right; };`

Answer & Solution

19.
In the following declaration of bit-fields, the constant-expression specifies . . . . . . . .

`struct-declarator: declarator type-specifier declarator opt : constant-expression`

Answer & Solution

20.
What will be the output of the following C code?

`#include <stdio.h> struct student { char *c; }; void main() { struct student s[2]; printf("%d", sizeof(s)); }`

Answer & Solution

Read More Section(Structure and Union)

Structure and Union - C Programming MCQ Questions and Answers

11. What will be the output of the following C code? #include <stdio.h> union p { int x; char y; }; int main() { union p p, b; p.y = 60; b.x = 12; printf("%d\n", p.y); }

Answer & Solution

12. What will be the output of the following C code? #include <stdio.h> struct p { int k; char c; float f; }; int p = 10; int main() { struct p x = {1, 97}; printf("%f %d\n", x.f, p); }

Answer & Solution

13. Which of the following structure declaration will throw an error?

Answer & Solution

14. 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; u.p.x = 2; printf("%d\n", u.p.x); }

Answer & Solution

15. What will be the output of the following C code? #include <stdio.h> struct student { int no; char name[20]; } void main() { struct student s; s.no = 8; printf("hello"); }

Answer & Solution

16. Which of the following is false about typedef?

Answer & Solution

17. Which function is responsible for recording the name "s" and the replacement text "t" in a table?

Answer & Solution

18. The number of distinct nodes the following struct declaration can point to is . . . . . . . . struct node { struct node *left; struct node *centre; struct node *right; };

Answer & Solution

19. In the following declaration of bit-fields, the constant-expression specifies . . . . . . . . struct-declarator: declarator type-specifier declarator opt : constant-expression

Answer & Solution

20. What will be the output of the following C code? #include <stdio.h> struct student { char *c; }; void main() { struct student s[2]; printf("%d", sizeof(s)); }

Answer & Solution

Read More Section(Structure and Union)

11.
What will be the output of the following C code?

`#include <stdio.h> union p { int x; char y; }; int main() { union p p, b; p.y = 60; b.x = 12; printf("%d\n", p.y); }`

12.
What will be the output of the following C code?

`#include <stdio.h> struct p { int k; char c; float f; }; int p = 10; int main() { struct p x = {1, 97}; printf("%f %d\n", x.f, p); }`

13.
Which of the following structure declaration will throw an error?

14.
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; u.p.x = 2; printf("%d\n", u.p.x); }`

15.
What will be the output of the following C code?

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

16.
Which of the following is false about typedef?

17.
Which function is responsible for recording the name "s" and the replacement text "t" in a table?

18.
The number of distinct nodes the following struct declaration can point to is . . . . . . . .

`struct node { struct node left; struct node centre; struct node *right; };`

19.
In the following declaration of bit-fields, the constant-expression specifies . . . . . . . .

`struct-declarator: declarator type-specifier declarator opt : constant-expression`

20.
What will be the output of the following C code?

`#include <stdio.h> struct student { char *c; }; void main() { struct student s[2]; printf("%d", sizeof(s)); }`