Explore topic-wise MCQs in C Programming.

This section includes 55 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

1.

Is the following declaration correct?;

A. Yes
B. No
Answer» B. No
Discussion
2.

Are the following declarations same?

A. Yes
B. No
Answer» C.
Discussion
3.

It is not necessary to typecast the address returned by .

A. True
B. False
Answer» C.
Discussion
4.

Is the following declaration correct?

A. Yes
B. No
Answer» C.
Discussion
5.

Does the data type of all elements in the will be same.

A. True
B. False
Answer» C.
Discussion
6.

What will be the output of the program?_x000D_ #include_x000D_ typedef void v;_x000D_ typedef int i;_x000D_ _x000D_ int main()_x000D_ {_x000D_ v fun(i, i);_x000D_ fun(2, 3);_x000D_ return 0;_x000D_ }_x000D_ v fun(i a, i b)_x000D_ {_x000D_ i s=2;_x000D_ float i;_x000D_ printf("%d,", sizeof(i));_x000D_ printf(" %d", a*b*s);_x000D_ }

A. 2, 8
B. 4, 8
C. 2, 4
D. 4, 12
Answer» E.
Discussion
7.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ struct s1_x000D_ {_x000D_ char *z;_x000D_ int i;_x000D_ struct s1 *p;_x000D_ };_x000D_ static struct s1 a[] = {{"Nagpur", 1, a+1} , {"Chennai", 2, a+2} , _x000D_ {"Bangalore", 3, a} };_x000D_ _x000D_ struct s1 *ptr = a;_x000D_ printf("%s,", ++(ptr->z));_x000D_ printf(" %s,", a[(++ptr)->i].z);_x000D_ printf(" %s", a[--(ptr->p->i)].z);_x000D_ return 0;_x000D_ }

A. Nagpur, Chennai, Bangalore
B. agpur, hennai, angalore
C. agpur, Chennai, angalore
D. agpur, Bangalore, Bangalore
Answer» E.
Discussion
8.

Declare the following statement?_x000D_ "An array of three pointers to chars".

A. char *ptr[3]();
B. char *ptr[3];
C. char (*ptr[3])();
D. char **ptr[3];
Answer» C. char (*ptr[3])();
Discussion
9.

Declare the following statement?_x000D_ "A pointer to an array of three chars".

A. char *ptr[3]();
B. char (*ptr)*[3];
C. char (*ptr[3])();
D. char (*ptr)[3];
Answer» E.
Discussion
10.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ char huge *near *far *ptr1;_x000D_ char near *far *huge *ptr2;_x000D_ char far *huge *near *ptr3;_x000D_ printf("%d, %d, %d\n", sizeof(**ptr1), sizeof(ptr2), sizeof(*ptr3));_x000D_ return 0;_x000D_ }

A. 4, 4, 4
B. 2, 2, 2
C. 2, 8, 4
D. 2, 4, 8
Answer» B. 2, 2, 2
Discussion
11.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ char huge *near *far *ptr1;_x000D_ char near *far *huge *ptr2;_x000D_ char far *huge *near *ptr3;_x000D_ printf("%d, %d, %d\n", sizeof(ptr1), sizeof(*ptr2), sizeof(**ptr3));_x000D_ return 0;_x000D_ }

A. 4, 4, 4
B. 2, 4, 4
C. 4, 4, 2
D. 2, 4, 8
Answer» B. 2, 4, 4
Discussion
12.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ char huge *near *ptr1;_x000D_ char huge *far *ptr2;_x000D_ char huge *huge *ptr3;_x000D_ printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3));_x000D_ return 0;_x000D_ }

A. 4, 4, 8
B. 2, 4, 4
C. 4, 4, 2
D. 2, 4, 8
Answer» C. 4, 4, 2
Discussion
13.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ char far *near *ptr1;_x000D_ char far *far *ptr2;_x000D_ char far *huge *ptr3;_x000D_ printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3));_x000D_ return 0;_x000D_ }

A. 4, 4, 8
B. 4, 4, 4
C. 2, 4, 4
D. 2, 4, 8
Answer» D. 2, 4, 8
Discussion
14.

What do the following declaration signify?_x000D_ int *f();

A. f is a pointer variable of function type.
B. f is a function returning pointer to an int.
C. f is a function pointer.
D. f is a simple declaration of pointer variable.
Answer» C. f is a function pointer.
Discussion
15.

Declare the following statement?''An array of three pointers to chars''.

A. char *ptr[3]();
B. char *ptr[3];
C. char (*ptr[3])();
D. char **ptr[3];
Answer» C. char (*ptr[3])();
Discussion
16.

Declare the following statement?''A pointer to a function which receives nothing and returns nothing''.

A. void *(ptr)*int;
B. void *(*ptr)()
C. void *(*ptr)(*)
D. void (*ptr)()
Answer» E.
Discussion
17.

Declare the following statement?''A pointer to a function which receives an int pointer and returns float pointer''.

A. float *(ptr)*int;
B. float *(*ptr)(int)
C. float *(*ptr)(int*)
D. float (*ptr)(int)
Answer» D. float (*ptr)(int)
Discussion
18.

Declare the following statement?''A pointer to an array of three chars''

A. char *ptr[3]();
B. char (*ptr)*[3];
C. char (*ptr[3])();
D. char (*ptr)[3];
Answer» E.
Discussion
19.

What will be the output of the program? #include int main() { struct s1 { char *z; int i; struct s1 *p; }; static struct s1 a[] = {{"Nagpur", 1, a+1} , {"Chennai", 2, a+2} , {"Bangalore", 3, a} }; struct s1 *ptr = a; printf("%s,", ++(ptr->z)); printf(" %s,", a[(++ptr)->i].z); printf(" %s", a[--(ptr->p->i)].z); return 0; }

A. Nagpur, Chennai, Bangalore
B. agpur, hennai, angalore
C. agpur, Chennai, angalore
D. agpur, Bangalore, Bangalore
Answer» E.
Discussion
20.

What will be the output of the program under DOS? #include int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(**ptr2), sizeof(ptr3)); return 0; }

A. 4, 4, 4
B. 4, 2, 2
C. 2, 8, 4
D. 2, 4, 8
Answer» C. 2, 8, 4
Discussion
21.

What will be the output of the program in Turbo C? #include int main() { char near *near *ptr1; char near *far *ptr2; char near *huge *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }

A. 4, 4, 8
B. 4, 4, 4
C. 2, 4, 8
D. 2, 4, 4
Answer» E.
Discussion
22.

What will be the output of the program in DOS (Compiler - Turbo C)? #include double i; int main() { (int)(float)(char) i; printf("%d",sizeof(i)); return 0; }

A. 4
B. 8
C. 16
D. 22
Answer» C. 16
Discussion
23.

What will be the output of the program? #include typedef unsigned long int uli; typedef uli u; int main() { uli a; u b = -1; a = -1; printf("%lu, %lu", a, b); return 0; }

A. 4343445454, 4343445454
B. 4545455434, 4545455434
C. 4294967295, 4294967295
D. Garbage values
Answer» D. Garbage values
Discussion
24.

Point out the error in the following program. #include #include int main() { static char *p = (char *)malloc(10); return 0; }

A. Error: Lvalue required
B. Error: Rvalue required
C. Error: invalid *p declaration
D. No error
Answer» E.
Discussion
25.

We can modify the pointers "source" as well as "target".

A. 1
B.
Answer» B.
Discussion
26.

Are the following declarations same? char far *far *scr; char far far** scr;

A. Yes
B. No
Answer» C.
Discussion
27.

What will be the output of the program? #include int main() { char huge *near *ptr1; char huge *far *ptr2; char huge *huge *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }

A. 4, 4, 8
B. 2, 4, 4
C. 4, 4, 2
D. 2, 4, 8
Answer» C. 4, 4, 2
Discussion
28.

What do the following declaration signify? int *f();

A. f is a pointer variable of function type.
B. f is a function returning pointer to an int.
C. f is a function pointer.
D. f is a simple declaration of pointer variable.
Answer» C. f is a function pointer.
Discussion
29.

What will be the output of the program? #include typedef void v; typedef int i; int main() { v fun(i, i); fun(2, 3); return 0; } v fun(i a, i b) { i s=2; float i; printf("%d,", sizeof(i)); printf(" %d", a*b*s); }

A. 2, 8
B. 4, 8
C. 2, 4
D. 4, 12
Answer» E.
Discussion
30.

It is not necessary to typecast the address returned by malloc().

A. 1
B.
Answer» C.
Discussion
31.

What will be the output of the program? #include int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(**ptr1), sizeof(ptr2), sizeof(*ptr3)); return 0; }

A. 4, 4, 4
B. 2, 2, 2
C. 2, 8, 4
D. 2, 4, 8
Answer» B. 2, 2, 2
Discussion
32.

Is the following declaration correct?char far *far *ptr;

A. Yes
B. No
Answer» B. No
Discussion
33.

What will be the output of the program? #include int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(*ptr2), sizeof(**ptr3)); return 0; }

A. 4, 4, 4
B. 2, 4, 4
C. 4, 4, 2
D. 2, 4, 8
Answer» B. 2, 4, 4
Discussion
34.

Function can return a floating point number.

A. 1
B.
Answer» B.
Discussion
35.

Point out the error in the following program. #include void display(int (*ff)()); int main() { int show(); int (*f)(); f = show; display(f); return 0; } void display(int (*ff)()) { (*ff)(); } int show() { printf("IndiaBIX"); }

A. Error: invalid parameter in function display()
B. Error: invalid function call f=show;
C. No error and prints "IndiaBIX"
D. No error and prints nothing.
Answer» D. No error and prints nothing.
Discussion
36.

What will be the output of the program in DOS (Compiler - Turbo C)? #include double i; int main() { (int)(float)(char) i; printf("%d", sizeof((int)(float)(char)i)); return 0; }

A. 1
B. 2
C. 4
D. 8
Answer» C. 4
Discussion
37.

What do the following declaration signify? char *scr;

A. scr is a pointer to pointer variable.
B. scr is a function pointer.
C. scr is a pointer to char.
D. scr is a member of function pointer.
Answer» D. scr is a member of function pointer.
Discussion
38.

What do the following declaration signify? void *cmp();

A. cmp is a pointer to an void type.
B. cmp is a void type pointer variable.
C. cmp is a function that return a void pointer.
D. cmp function returns nothing.
Answer» D. cmp function returns nothing.
Discussion
39.

Is the following declaration correct?void(*f)(int, void(*)());

A. Yes
B. No
Answer» B. No
Discussion
40.

Declare the following statement? "A pointer to a function which receives nothing and returns nothing".

A. void *(ptr)*int;
B. void *(*ptr)()
C. void *(*ptr)(*)
D. void (*ptr)()
Answer» E.
Discussion
41.

Is the following declaration correct?char (* ( *f())[])();

A. Yes
B. No
Answer» B. No
Discussion
42.

We can allocate a 2-Dimensional array dynamically.

A. 1
B.
Answer» B.
Discussion
43.

What do the following declaration signify? void (*cmp)();

A. cmp is a pointer to an void function type.
B. cmp is a void type pointer function.
C. cmp is a function that return a void pointer.
D. cmp is a pointer to a function which returns void .
Answer» E.
Discussion
44.

What will be the output of the program (in Turbo C under DOS)? #include int main() { char huge *near *far *ptr1; char near *far *huge *ptr2; char far *huge *near *ptr3; printf("%d, %d, %d\n", sizeof(ptr1), sizeof(ptr2), sizeof(ptr3)); return 0; }

A. 4, 4, 8
B. 2, 4, 4
C. 4, 4, 2
D. 2, 4, 8
Answer» D. 2, 4, 8
Discussion
45.

What do the following declaration signify? int (*pf)();

A. pf is a pointer to function.
B. pf is a function pointer.
C. pf is a pointer to a function which return int
D. pf is a function of pointer variable.
Answer» D. pf is a function of pointer variable.
Discussion
46.

Declare the following statement? "A pointer to an array of three chars".

A. char *ptr[3]();
B. char (*ptr)*[3];
C. char (*ptr[3])();
D. char (*ptr)[3];
Answer» E.
Discussion
47.

Point out the error in the following program (in Turbo C under DOS). #include union emp { int empno; int age; }; int main() { union emp e = {10, 25}; printf("%d %d", e.empno, e.age); return 0; }

A. Error: Lvalue required
B. Error: Rvalue required
C. Error: cannot initialize more than one union member.
D. No error
Answer» D. No error
Discussion
48.

What do the following declaration signify? char *arr[10];

A. arr is a array of 10 character pointers.
B. arr is a array of function pointer.
C. arr is a array of characters.
D. arr is a pointer to array of characters.
Answer» B. arr is a array of function pointer.
Discussion
49.

Does the data type of all elements in the union will be same.

A. 1
B.
C. 1
D.
Answer» C. 1
Discussion
50.

What do the following declaration signify? char **argv;

A. argv is a pointer to pointer.
B. argv is a pointer to a char pointer.
C. argv is a function pointer.
D. argv is a member of function pointer.
Answer» C. argv is a function pointer.
Discussion