Pointer - C Programming MCQ Questions and Answers Page-3 section-2

Section 1 Section 2 Section 3

21.
One of the uses for function pointers in C is . . . . . . . .

A. Nothing

B. There are no function pointers in c

C. To invoke a function

D. To call a function defined at run-time

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22.

Comment on the following pointer declaration.

int *ptr, p;

A. ptr is a pointer to integer, p is not

B. ptr and p, both are pointers to integer

C. ptr is a pointer to integer, p may or may not be

D. ptr and p both are not pointers to integer

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23.

What will be the output of the following C code?

#include <stdio.h>
void f(int);
void (*foo)() = f;
int main(int argc, char *argv[])
{
    foo(10);
    return 0;
}
void f(int i)
{
    printf("%d\n", i);
}

A. Compile time error

B. 10

C. Undefined behaviour

D. None of the mentioned

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24.

What will be the output of the following C code?

#include <stdio.h>
void foo(int*);
int main()
{
    int i = 10, *p = &i;
    foo(p++);
}
void foo(int *p)
{
    printf("%d\n", *p);
}

A. 10

B. Some garbage value

C. Compile time error

D. Segmentation fault

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25.

What will be the output of the following C code?

#include <stdio.h>
void (*(f)())(int, float);
typedef void (*(*x)())(int, float);
void foo(int i, float f);
int main()
{
    x p = f;
    p();
}
void (*(f)())(int, float)
{
    return foo;
}
void foo(int i, float f)
{
    printf("%d %f\n", i, f);
}

A. Compile time error

B. Undefined behaviour

C. 1 2.000000

D. Nothing

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26.

What will be the output of the following C code?

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

A. Nothing

B. Compile time error

C. Junk

D. 8

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27.

What are the elements present in the array of the following C code?

int array[5] = {5};

A. 5, 5, 5, 5, 5

B. 5, 0, 0, 0, 0

C. 5, (garbage), (garbage), (garbage), (garbage)

D. (garbage), (garbage), (garbage), (garbage), 5

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28.

What will be the output of the following C code?

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

A. Nothing

B. hello

C. Compile time error

D. Varies

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29.

What will be the output of the following C code?

#include <stdio.h>
void foo(float *);
int main()
{
    int i = 10, *p = &i;
    foo(&i);
}
void foo(float *p)
{
    printf("%f\n", *p);
}

A. 10.000000

B. 0.000000

C. Compile time error

D. Undefined behaviour

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30.

What will be the output of the following C code?

#include <stdio.h>
void main()
{
    char *a[10] = {"hi", "hello", "how"};
    int i = 0, j = 0;
    a[0] = "hey";
    for (i = 0;i < 10; i++)
    printf("%s\n", a[i]);
}

A. hi hello how Segmentation fault

B. hi hello how followed by 7 null values

C. hey hello how Segmentation fault

D. depends on compiler

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1 2 3 4 5 6 7 8 9 10

21.
One of the uses for function pointers in C is . . . . . . . .

Answer & Solution

22.
Comment on the following pointer declaration.

`int *ptr, p;`

Answer & Solution

23.
What will be the output of the following C code?

`#include <stdio.h> void f(int); void (foo)() = f; int main(int argc, char argv[]) { foo(10); return 0; } void f(int i) { printf("%d\n", i); }`

Answer & Solution

24.
What will be the output of the following C code?

`#include <stdio.h> void foo(int); int main() { int i = 10, p = &i; foo(p++); } void foo(int p) { printf("%d\n", p); }`

Answer & Solution

25.
What will be the output of the following C code?

`#include <stdio.h> void ((f)())(int, float); typedef void ((x)())(int, float); void foo(int i, float f); int main() { x p = f; p(); } void ((f)())(int, float) { return foo; } void foo(int i, float f) { printf("%d %f\n", i, f); }`

Answer & Solution

26.
What will be the output of the following C code?

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

Answer & Solution

27.
What are the elements present in the array of the following C code?

`int array[5] = {5};`

Answer & Solution

28.
What will be the output of the following C code?

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

Answer & Solution

29.
What will be the output of the following C code?

`#include <stdio.h> void foo(float ); int main() { int i = 10, p = &i; foo(&i); } void foo(float p) { printf("%f\n", p); }`

Answer & Solution

30.
What will be the output of the following C code?

`#include <stdio.h> void main() { char *a[10] = {"hi", "hello", "how"}; int i = 0, j = 0; a[0] = "hey"; for (i = 0;i < 10; i++) printf("%s\n", a[i]); }`

Answer & Solution

Read More Section(Pointer)

Pointer - C Programming MCQ Questions and Answers

21. One of the uses for function pointers in C is . . . . . . . .

Answer & Solution

22. Comment on the following pointer declaration. int *ptr, p;

Answer & Solution

23. What will be the output of the following C code? #include <stdio.h> void f(int); void (*foo)() = f; int main(int argc, char *argv[]) { foo(10); return 0; } void f(int i) { printf("%d\n", i); }

Answer & Solution

24. What will be the output of the following C code? #include <stdio.h> void foo(int*); int main() { int i = 10, *p = &i; foo(p++); } void foo(int *p) { printf("%d\n", *p); }

Answer & Solution

25. What will be the output of the following C code? #include <stdio.h> void (*(f)())(int, float); typedef void (*(*x)())(int, float); void foo(int i, float f); int main() { x p = f; p(); } void (*(f)())(int, float) { return foo; } void foo(int i, float f) { printf("%d %f\n", i, f); }

Answer & Solution

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

Answer & Solution

27. What are the elements present in the array of the following C code? int array[5] = {5};

Answer & Solution

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

Answer & Solution

29. What will be the output of the following C code? #include <stdio.h> void foo(float *); int main() { int i = 10, *p = &i; foo(&i); } void foo(float *p) { printf("%f\n", *p); }

Answer & Solution

30. What will be the output of the following C code? #include <stdio.h> void main() { char *a[10] = {"hi", "hello", "how"}; int i = 0, j = 0; a[0] = "hey"; for (i = 0;i < 10; i++) printf("%s\n", a[i]); }

Answer & Solution

Read More Section(Pointer)

21.
One of the uses for function pointers in C is . . . . . . . .

22.
Comment on the following pointer declaration.

`int *ptr, p;`

23.
What will be the output of the following C code?

`#include <stdio.h> void f(int); void (foo)() = f; int main(int argc, char argv[]) { foo(10); return 0; } void f(int i) { printf("%d\n", i); }`

24.
What will be the output of the following C code?

`#include <stdio.h> void foo(int); int main() { int i = 10, p = &i; foo(p++); } void foo(int p) { printf("%d\n", p); }`

25.
What will be the output of the following C code?

`#include <stdio.h> void ((f)())(int, float); typedef void ((x)())(int, float); void foo(int i, float f); int main() { x p = f; p(); } void ((f)())(int, float) { return foo; } void foo(int i, float f) { printf("%d %f\n", i, f); }`

26.
What will be the output of the following C code?

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

27.
What are the elements present in the array of the following C code?

`int array[5] = {5};`

28.
What will be the output of the following C code?

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

29.
What will be the output of the following C code?

`#include <stdio.h> void foo(float ); int main() { int i = 10, p = &i; foo(&i); } void foo(float p) { printf("%f\n", p); }`

30.
What will be the output of the following C code?

`#include <stdio.h> void main() { char *a[10] = {"hi", "hello", "how"}; int i = 0, j = 0; a[0] = "hey"; for (i = 0;i < 10; i++) printf("%s\n", a[i]); }`