Explore topic-wise MCQs in C Programming.

This section includes 202 Mcqs, each offering curated multiple-choice questions to sharpen your C Programming knowledge and support exam preparation. Choose a topic below to get started.

151.

What will be the output of the program If the integer is 4bytes long?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int ***r, **q, *p, i=8;_x000D_ p = &i;_x000D_ q = &p;_x000D_ r = &q;_x000D_ printf("%d, %d, %d\n", *p, **q, ***r);_x000D_ return 0;_x000D_ }

A. 8, 8, 8
B. 4000, 4002, 4004
C. 4000, 4004, 4008
D. 4000, 4008, 4016
Answer» B. 4000, 4002, 4004
Discussion
152.

What will be the output of the program ? #include int main() { char *p; p="hello"; printf("%s\n", *&*&p); return 0; }

A. llo
B. hello
C. ello
D. h
Answer» C. ello
Discussion
153.

What will be the output of the program assuming that the array begins at location 1002?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int a[2][3][4] = { {1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2}, _x000D_ {2, 1, 4, 7, 6, 7, 8, 9, 0, 0, 0, 0} };_x000D_ printf("%u, %u, %u, %d\n", a, *a, **a, ***a);_x000D_ return 0;_x000D_ }

A. 1002, 2004, 4008, 2
B. 2004, 4008, 8016, 1
C. 1002, 1002, 1002, 1
D. Error
Answer» D. Error
Discussion
154.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int arr[3] = {2, 3, 4};_x000D_ char *p;_x000D_ p = arr;_x000D_ p = (char*)((int*)(p));_x000D_ printf("%d, ", *p);_x000D_ p = (int*)(p+1);_x000D_ printf("%d", *p);_x000D_ return 0;_x000D_ }

A. 2, 3
B. 2, 0
C. 2, Garbage value
D. 0, 0
Answer» C. 2, Garbage value
Discussion
155.

What will be the output of the program?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int arr[2][2][2] = {10, 2, 3, 4, 5, 6, 7, 8};_x000D_ int *p, *q;_x000D_ p = &arr[1][1][1];_x000D_ q = (int*) arr;_x000D_ printf("%d, %d\n", *p, *q);_x000D_ return 0;_x000D_ }

A. 8, 10
B. 10, 2
C. 8, 1
D. Garbage values
Answer» B. 10, 2
Discussion
156.

What will be the output of the program assuming that the array begins at the location 1002 and size of an integer is 4 bytes?_x000D_ #include_x000D_ _x000D_ int main()_x000D_ {_x000D_ int a[3][4] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };_x000D_ printf("%u, %u, %u\n", a[0]+1, *(a[0]+1), *(*(a+0)+1));_x000D_ return 0;_x000D_ }

A. 448, 4, 4
B. 520, 2, 2
C. 1006, 2, 2
D. Error
Answer» D. Error
Discussion
157.

What will be the output of the program ? #include int *check(static int, static int); int main() { int *c; c = check(10, 20); printf("%d\n", c); return 0; } int *check(static int i, static int j) { int *p, *q; p = &i; q = &j; if(i >= 45) return (p); else return (q); }

A. 10
B. 20
C. Error: Non portable pointer conversion
D. Error: cannot use static for function parameters
Answer» E.
Discussion
158.

What will be the output of the program ? #include int main() { char *p; p="hello"; printf("%s\n", *&*&p); return 0; }

A. llo
B. hello
C. ello
D. h
Answer» C. ello
Discussion
159.

What will be the output of the program ? #include power(int**); int main() { int a=5, *aa; /* Address of 'a' is 1000 */ aa = &a; a = power(&aa); printf("%d\n", a); return 0; } power(int **ptr) { int b; b = **ptr***ptr; return (b); }

A. 5
B. 25
C. 125
D. Garbage value
Answer» C. 125
Discussion
160.

What will be the output of the program? #include int main() { int arr[3] = {2, 3, 4}; char *p; p = arr; p = (char*)((int*)(p)); printf("%d, ", *p); p = (int*)(p+1); printf("%d", *p); return 0; }

A. 2, 3
B. 2, 0
C. 2, Garbage value
D. 0, 0
Answer» C. 2, Garbage value
Discussion
161.

In the following program add a statement in the function fact() such that the factorial gets stored in j. #include void fact(int*); int main() { int i=5; fact(&i); printf("%d\n", i); return 0; } void fact(int *j) { static int s=1; if(*j!=0) { s = s**j; *j = *j-1; fact(j); /* Add a statement here */ } }

A. j=s;
B. *j=s;
C. *j=&s;
D. &j=s;
Answer» C. *j=&s;
Discussion
162.

What will be the output of the program if the size of pointer is 4-bytes? #include int main() { printf("%d, %d\n", sizeof(NULL), sizeof("")); return 0; }

A. 2, 1
B. 2, 2
C. 4, 1
D. 4, 2
Answer» D. 4, 2
Discussion
163.

What will be the output of the program ? #include int main() { int i, a[] = {2, 4, 6, 8, 10}; change(a, 5); for(i=0; i<=4; i++) printf("%d, ", a[i]); return 0; } void change(int *b, int n) { int i; for(i=0; i

A. 7, 9, 11, 13, 15
B. 2, 15, 6, 8, 10
C. 2 4 6 8 10
D. 3, 1, -1, -3, -5
Answer» C. 2 4 6 8 10
Discussion
164.

Which statement will you add to the following program to ensure that the program outputs "IndiaBIX" on execution? #include int main() { char s[] = "IndiaBIX"; char t[25]; char *ps, *pt; ps = s; pt = t; while(*ps) *pt++ = *ps++; /* Add a statement here */ printf("%s\n", t); return 0; }

A. *pt='';
B. pt='\0';
C. pt='\n';
D. *pt='\0';
Answer» E.
Discussion
165.

What will be the output of the program ? #include int main() { char *str; str = "%s"; printf(str, "K\n"); return 0; }

A. Error
B. No output
C. K
D. %s
Answer» D. %s
Discussion
166.

What will be the output of the program assuming that the array begins at the location 1002 and size of an integer is 4 bytes? #include int main() { int a[3][4] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 }; printf("%u, %u, %u\n", a[0]+1, *(a[0]+1), *(*(a+0)+1)); return 0; }

A. 448, 4, 4
B. 520, 2, 2
C. 1006, 2, 2
D. Error
Answer» D. Error
Discussion
167.

What will be the output of the program ? #include int main() { char *str; str = "%d\n"; str++; str++; printf(str-2, 300); return 0; }

A. No output
B. 30
C. 3
D. 300
Answer» E.
Discussion
168.

What will be the output of the program assuming that the array begins at location 1002? #include int main() { int a[2][3][4] = { {1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 1, 2}, {2, 1, 4, 7, 6, 7, 8, 9, 0, 0, 0, 0} }; printf("%u, %u, %u, %d\n", a, *a, **a, ***a); return 0; }

A. 1002, 2004, 4008, 2
B. 2004, 4008, 8016, 1
C. 1002, 1002, 1002, 1
D. Error
Answer» D. Error
Discussion
169.

What will be the output of the program ? #include int main() { printf("%c\n", 7["IndiaBIX"]); return 0; }

A. Error: in printf
B. Nothing will print
C. print "X" of IndiaBIX
D. print "7"
Answer» D. print "7"
Discussion
170.

What will be the output of the program ? #include int main() { void *vp; char ch=74, *cp="JACK"; int j=65; vp=&ch; printf("%c", *(char*)vp); vp=&j; printf("%c", *(int*)vp); vp=cp; printf("%s", (char*)vp+2); return 0; }

A. JCK
B. J65K
C. JAK
D. JACK
Answer» E.
Discussion
171.

If the size of integer is 4bytes, What will be the output of the program? #include int main() { int arr[] = {12, 13, 14, 15, 16}; printf("%d, %d, %d\n", sizeof(arr), sizeof(*arr), sizeof(arr[0])); return 0; }

A. 10, 2, 4
B. 20, 4, 4
C. 16, 2, 2
D. 20, 2, 2
Answer» C. 16, 2, 2
Discussion
172.

What will be the output of the program ? #include int main() { char str1[] = "India"; char str2[] = "BIX"; char *s1 = str1, *s2=str2; while(*s1++ = *s2++) printf("%s", str1); printf("\n"); return 0; }

A. IndiaBIX
B. BndiaBIdiaBIXia
C. India
D. (null)
Answer» C. India
Discussion
173.

What will be the output of the program? #include int main() { int arr[2][2][2] = {10, 2, 3, 4, 5, 6, 7, 8}; int *p, *q; p = &arr[1][1][1]; q = (int*) arr; printf("%d, %d\n", *p, *q); return 0; }

A. 8, 10
B. 10, 2
C. 8, 1
D. Garbage values
Answer» B. 10, 2
Discussion
174.

Will the program compile in Turbo C? #include int main() { int a=10, *j; void *k; j=k=&a; j++; k++; printf("%u %u\n", j, k); return 0; }

A. Yes
B. No
Answer» C.
Discussion
175.

What will be the output of the program If the integer is 4bytes long? #include int main() { int ***r, **q, *p, i=8; p = &i; q = &p; r = &q; printf("%d, %d, %d\n", *p, **q, ***r); return 0; }

A. 8, 8, 8
B. 4000, 4002, 4004
C. 4000, 4004, 4008
D. 4000, 4008, 4016
Answer» B. 4000, 4002, 4004
Discussion
176.

What will be the output of the program ? #include void fun(void *p); int i; int main() { void *vptr; vptr = &i; fun(vptr); return 0; } void fun(void *p) { int **q; q = (int**)&p; printf("%d\n", **q); }

A. Error: cannot convert from void** to int**
B. Garbage value
C. 0
D. No output
Answer» D. No output
Discussion
177.

The following program reports an error on compilation. #include int main() { float i=10, *j; void *k; k=&i; j=k; printf("%f\n", *j); return 0; }

A. 1
B.
Answer» C.
Discussion
178.

What will be the output of the program ? #include int main() { char str[20] = "Hello"; char *const p=str; *p='M'; printf("%s\n", str); return 0; }

A. Mello
B. Hello
C. HMello
D. MHello
Answer» B. Hello
Discussion
179.

Will the following program give any warning on compilation in TurboC (under DOS)? #include int main() { int *p1, i=25; void *p2; p1=&i; p2=&i; p1=p2; p2=p1; return 0; }

A. Yes
B. No
Answer» C.
Discussion
180.

Which of the statements is correct about the program? #include int main() { int i=10; int *j=&i; return 0; }

A. j and i are pointers to an int
B. i is a pointer to an int and stores address of j
C. j is a pointer to an int and stores address of i
D. j is a pointer to a pointer to an int and stores address of i
Answer» D. j is a pointer to a pointer to an int and stores address of i
Discussion
181.

Which of the following statements correct about k used in the below statement?char ****k;

A. k is a pointer to a pointer to a pointer to a char
B. k is a pointer to a pointer to a pointer to a pointer to a char
C. k is a pointer to a char pointer
D. k is a pointer to a pointer to a char
Answer» C. k is a pointer to a char pointer
Discussion
182.

Will the program compile? #include int main() { char str[5] = "IndiaBIX"; return 0; }

A. 1
B.
Answer» B.
Discussion
183.

In the following program add a statement in the function fun() such that address of a gets stored in j? #include int main() { int *j; void fun(int**); fun(&j); return 0; } void fun(int **k) { int a=10; /* Add a statement here */ }

A. **k=a;
B. k=&a;
C. *k=&a
D. &k=*a
Answer» D. &k=*a
Discussion
184.

What will be the output of the program ? #include #include int main() { int i, n; char *x="Alice"; n = strlen(x); *x = x[n]; for(i=0; i<=n; i++) { printf("%s ", x); x++; } printf("\n", x); return 0; }

A. Alice
B. ecilA
C. Alice lice ice ce e
D. lice ice ce e
Answer» E.
Discussion
185.

Is this a correct way for NULL pointer assignment? int i=0;char *q=(char*)i;

A. Yes
B. No
Answer» C.
Discussion
186.

Are the three declarations char **apple, char *apple[], and char apple[][] same?

A. 1
B.
Answer» C.
Discussion
187.

Which of the statements is correct about the program? #include int main() { float a=3.14; char *j; j = (char*)&a; printf("%d\n", *j); return 0; }

A. It prints ASCII value of the binary number present in the first byte of a float variable a.
B. It prints character equivalent of the binary number present in the first byte of a float variable a.
C. It will print 3
D. It will print a garbage value
Answer» B. It prints character equivalent of the binary number present in the first byte of a float variable a.
Discussion
188.

Point out the error in the program #include int main() { int a[] = {10, 20, 30, 40, 50}; int j; for(j=0; j<5; j++) { printf("%d\n", a); a++; } return 0; }

A. Error: Declaration syntax
B. Error: Expression syntax
C. Error: LValue required
D. Error: Rvalue required
Answer» D. Error: Rvalue required
Discussion
189.

What will be the output of the program ? #include int main() { char str[] = "peace"; char *s = str; printf("%s\n", s++ +3); return 0; }

A. peace
B. eace
C. ace
D. ce
Answer» E.
Discussion
190.

What will be the output of the program ? #include int main() { int x=30, *y, *z; y=&x; /* Assume address of x is 500 and integer is 4 byte size */ z=y; *y++=*z++; x++; printf("x=%d, y=%d, z=%d\n", x, y, z); return 0; }

A. x=31, y=502, z=502
B. x=31, y=500, z=500
C. x=31, y=498, z=498
D. x=31, y=504, z=504
Answer» E.
Discussion
191.

Which of the statements is correct about the program? #include int main() { int arr[3][3] = {1, 2, 3, 4}; printf("%d\n", *(*(*(arr)))); return 0; }

A. Output: Garbage value
B. Output: 1
C. Output: 3
D. Error: Invalid indirection
Answer» E.
Discussion
192.

Is the NULL pointer same as an uninitialised pointer?

A. Yes
B. No
Answer» C.
Discussion
193.

What will be the output of the program ? #include int main() { int i=3, *j, k; j = &i; printf("%d\n", i**j*i+*j); return 0; }

A. 30
B. 27
C. 9
D. 3
Answer» B. 27
Discussion
194.

Point out the compile time error in the program given below. #include int main() { int *x; *x=100; return 0; }

A. Error: invalid assignment for x
B. Error: suspicious pointer conversion
C. No error
D. None of above
Answer» D. None of above
Discussion
195.

Which of the following statements correctly declare a function that receives a pointer to pointer to a pointer to a float and returns a pointer to a pointer to a pointer to a pointer to a float?

A. float **fun(float***);
B. float *fun(float**);
C. float fun(float***);
D. float ****fun(float***);
Answer» E.
Discussion
196.

Can you combine the following two statements into one? char *p; p = (char*) malloc(100);

A. char p = *malloc(100);
B. char *p = (char) malloc(100);
C. char *p = (char*)malloc(100);
D. char *p = (char *)(malloc*)(100);
Answer» D. char *p = (char *)(malloc*)(100);
Discussion
197.

Is there any difference between the following two statements? char *p=0;char *t=NULL;

A. Yes
B. No
C. Yes
D. No
Answer» C. Yes
Discussion
198.

What will be the output of the program ? #include int main() { static char *s[] = {"black", "white", "pink", "violet"}; char **ptr[] = {s+3, s+2, s+1, s}, ***p; p = ptr; ++p; printf("%s", **p+1); return 0; }

A. ink
B. ack
C. ite
D. let
Answer» B. ack
Discussion
199.

What would be the equivalent pointer expression for referring the array element a[i][j][k][l]

A. ((((a+i)+j)+k)+l)
B. *(*(*(*(a+i)+j)+k)+l)
C. (((a+i)+j)+k+l)
D. ((a+i)+j+k+l)
Answer» C. (((a+i)+j)+k+l)
Discussion
200.

Are the expression *ptr++ and ++*ptr are same?

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