Pointer - C Programming MCQ Questions and Answers

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31.

What is the correct way to declare and assign a function pointer?

(Assuming the function to be assigned is "int multi(int, int);")

A. int (*fn_ptr)(int, int) = multi;

B. int *fn_ptr(int, int) = multi;

C. int *fn_ptr(int, int) = &multi;

D. none of the mentioned

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32.

What will be the output of the following C code?

#include <stdio.h>
struct student
{
    int no = 5;
    char name[20];
};
void main()
{
    struct student s;
    s.no = 8;
    printf("hello");
}

A. Nothing

B. Compile time error

C. hello

D. Varies

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33.
What type of array is generally generated in Command-line argument?

A. Single dimension array

B. 2-Dimensional Square Array

C. Jagged Array

D. 2-Dimensional Rectangular Array

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34.

What will be the output of the following C code?

#include <stdio.h>
void f(int (*x)(int));
int myfoo(int i);
int (*foo)(int) = myfoo;
int main()
{
    f(foo(10));
}
void f(int (*i)(int))
{
    i(11);
}
int myfoo(int i)
{
    printf("%d\n", i);
    return i;
}

A. Compile time error

B. Undefined behaviour

C. 10 11

D. 10 Segmentation fault

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35.

What will be the output of the following C code?

#include <stdio.h>
void fun(char *k)
{
    printf("%s", k);
}
void main()
{
    char s[] = "hello";
    fun(s);
}

A. hello

B. Run time error

C. Nothing

D. h

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36.

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int i = 0, j = 1;
    int *a[] = {&i, &j};
    printf("%d", *a[0]);
    return 0;
}

A. Compile time error

B. Undefined behaviour

C. 0

D. Some garbage value

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37.

What will be the output of the following C code?

#include <stdio.h>
int main()
{
    int *ptr, a = 10;
    ptr = &a;
    *ptr += 1;
    printf("%d,%d/n", *ptr, a);
}

A. 10,10

B. 10,11

C. 11,10

D. 11,11

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38.

What will be the output of the following C code?

#include <stdio.h>
int *f();
int main()
{
    int *p = f();
    printf("%d\n", *p);
}
int *f()
{
    int *j = (int*)malloc(sizeof(int));
    *j = 10;
    return j;
}

A. 10

B. Compile time error

C. Segmentation fault/runtime crash since pointer to local variable is returned

D. Undefined behaviour

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39.

Comment on the following two operations.

int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1
int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2

A. 1 works, 2 doesn't

B. 2 works, 1 doesn't

C. Both of them work

D. Neither of them work

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40.
Which of the following is a correct syntax to pass a Function Pointer as an argument?

A. void pass(int (*fptr)(int, float, char)){}

B. void pass(*fptr(int, float, char)){}

C. void pass(int (*fptr)){}

D. void pass(*fptr){}

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31.
What is the correct way to declare and assign a function pointer?

`(Assuming the function to be assigned is "int multi(int, int);")`

Answer & Solution

32.
What will be the output of the following C code?

`#include <stdio.h> struct student { int no = 5; char name[20]; }; void main() { struct student s; s.no = 8; printf("hello"); }`

Answer & Solution

33.
What type of array is generally generated in Command-line argument?

Answer & Solution

34.
What will be the output of the following C code?

`#include <stdio.h> void f(int (x)(int)); int myfoo(int i); int (foo)(int) = myfoo; int main() { f(foo(10)); } void f(int (*i)(int)) { i(11); } int myfoo(int i) { printf("%d\n", i); return i; }`

Answer & Solution

35.
What will be the output of the following C code?

`#include <stdio.h> void fun(char *k) { printf("%s", k); } void main() { char s[] = "hello"; fun(s); }`

Answer & Solution

36.
What will be the output of the following C code?

`#include <stdio.h> int main() { int i = 0, j = 1; int a[] = {&i, &j}; printf("%d", a[0]); return 0; }`

Answer & Solution

37.
What will be the output of the following C code?

`#include <stdio.h> int main() { int ptr, a = 10; ptr = &a; ptr += 1; printf("%d,%d/n", *ptr, a); }`

Answer & Solution

38.
What will be the output of the following C code?

`#include <stdio.h> int f(); int main() { int p = f(); printf("%d\n", p); } int f() { int j = (int)malloc(sizeof(int)); *j = 10; return j; }`

Answer & Solution

39.
Comment on the following two operations.

`int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1 int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2`

Answer & Solution

40.
Which of the following is a correct syntax to pass a Function Pointer as an argument?

Answer & Solution

Read More Section(Pointer)

Pointer - C Programming MCQ Questions and Answers

31. What is the correct way to declare and assign a function pointer? (Assuming the function to be assigned is "int multi(int, int);")

Answer & Solution

32. What will be the output of the following C code? #include <stdio.h> struct student { int no = 5; char name[20]; }; void main() { struct student s; s.no = 8; printf("hello"); }

Answer & Solution

33. What type of array is generally generated in Command-line argument?

Answer & Solution

34. What will be the output of the following C code? #include <stdio.h> void f(int (*x)(int)); int myfoo(int i); int (*foo)(int) = myfoo; int main() { f(foo(10)); } void f(int (*i)(int)) { i(11); } int myfoo(int i) { printf("%d\n", i); return i; }

Answer & Solution

35. What will be the output of the following C code? #include <stdio.h> void fun(char *k) { printf("%s", k); } void main() { char s[] = "hello"; fun(s); }

Answer & Solution

36. What will be the output of the following C code? #include <stdio.h> int main() { int i = 0, j = 1; int *a[] = {&i, &j}; printf("%d", *a[0]); return 0; }

Answer & Solution

37. What will be the output of the following C code? #include <stdio.h> int main() { int *ptr, a = 10; ptr = &a; *ptr += 1; printf("%d,%d/n", *ptr, a); }

Answer & Solution

38. What will be the output of the following C code? #include <stdio.h> int *f(); int main() { int *p = f(); printf("%d\n", *p); } int *f() { int *j = (int*)malloc(sizeof(int)); *j = 10; return j; }

Answer & Solution

39. Comment on the following two operations. int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1 int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2

Answer & Solution

40. Which of the following is a correct syntax to pass a Function Pointer as an argument?

Answer & Solution

Read More Section(Pointer)

31.
What is the correct way to declare and assign a function pointer?

`(Assuming the function to be assigned is "int multi(int, int);")`

32.
What will be the output of the following C code?

`#include <stdio.h> struct student { int no = 5; char name[20]; }; void main() { struct student s; s.no = 8; printf("hello"); }`

33.
What type of array is generally generated in Command-line argument?

34.
What will be the output of the following C code?

`#include <stdio.h> void f(int (x)(int)); int myfoo(int i); int (foo)(int) = myfoo; int main() { f(foo(10)); } void f(int (*i)(int)) { i(11); } int myfoo(int i) { printf("%d\n", i); return i; }`

35.
What will be the output of the following C code?

`#include <stdio.h> void fun(char *k) { printf("%s", k); } void main() { char s[] = "hello"; fun(s); }`

36.
What will be the output of the following C code?

`#include <stdio.h> int main() { int i = 0, j = 1; int a[] = {&i, &j}; printf("%d", a[0]); return 0; }`

37.
What will be the output of the following C code?

`#include <stdio.h> int main() { int ptr, a = 10; ptr = &a; ptr += 1; printf("%d,%d/n", *ptr, a); }`

38.
What will be the output of the following C code?

`#include <stdio.h> int f(); int main() { int p = f(); printf("%d\n", p); } int f() { int j = (int)malloc(sizeof(int)); *j = 10; return j; }`

39.
Comment on the following two operations.

`int *a[] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 1 int b[][] = {{1, 2, 3}, {1, 2, 3, 4}}; //- 2`

40.
Which of the following is a correct syntax to pass a Function Pointer as an argument?