Explore topic-wise MCQs in Engineering.

This section includes 564 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.

201.

What will be the output of the program (Turbo C in 16 bit platform DOS) ? #include<stdio.h> #include<string.h> int main() { char *str1 = "India"; char *str2 = "BIX"; char *str3; str3 = strcat(str1, str2); printf("%s %s n", str3, str1); return 0; }

A. IndiaBIX India
B. IndiaBIX IndiaBIX
C. India India
D. Error
Answer» C. India India
Discussion
202.

What will be the output of the program ? #include<stdio.h> int main() { float arr[] = {12.4, 2.3, 4.5, 6.7}; printf("%d n", sizeof(arr)/sizeof(arr[0])); return 0; }

A. 5
B. 4
C. 6
D. 7
Answer» C. 6
Discussion
203.

What will be the output of the program ? #include<stdio.h> int main() { printf(5+"IndiaBIX n"); return 0; }

A. Error
B. IndiaBIX
C. BIX
D. None of above
Answer» D. None of above
Discussion
204.

What will be the output of the program ? #include<stdio.h> int main() { enum status {pass, fail, absent}; enum status stud1, stud2, stud3; stud1 = pass; stud2 = absent; stud3 = fail; printf("%d %d %d n", stud1, stud2, stud3); return 0; }

A. 0, 1, 2
B. 1, 2, 3
C. 0, 2, 1
D. 1, 3, 2
Answer» D. 1, 3, 2
Discussion
205.

Point out the error in the program? struct emp { int ecode; struct emp e; };

A. Error: in structure declaration
B. Linker Error
C. No Error
D. None of above
Answer» B. Linker Error
Discussion
206.

Maximum number of arguments that a function can take is 12

A. Yes
B. No
Answer» C.
Discussion
207.

Which of the following sentences are correct about a switch loop in a C program? 1: switch is useful when we wish to check the value of variable against a particular set of values. 2: switch is useful when we wish to check whether a value falls in different ranges. 3: Compiler implements a jump table for cases used in switch. 4: It is not necessary to use a break in every switch statement.

A. 1,2
B. 1,3,4
C. 2,4
D. 2
Answer» C. 2,4
Discussion
208.

Functions cannot return a floating point number

A. Yes
B. No
Answer» C.
Discussion
209.

Every function must return a value

A. Yes
B. No
Answer» C.
Discussion
210.

Will the following functions work? int f1(int a, int b) { return ( f2(20) ); } int f2(int a) { return (a*a); }

A. Yes
B. No
Answer» B. No
Discussion
211.

A function cannot be defined inside another function

A. True
B. False
Answer» B. False
Discussion
212.

Functions cannot return more than one value at a time

A. True
B. False
Answer» B. False
Discussion
213.

If return type for a function is not specified, it defaults to int

A. True
B. False
Answer» B. False
Discussion
214.

In C all functions except main() can be called recursively.

A. True
B. False
Answer» C.
Discussion
215.

Functions can be called either by value or reference

A. True
B. False
Answer» B. False
Discussion
216.

Point out the error in the program #include<stdio.h> int main() { int a=10; void f(); a = f(); printf("%d n", a); return 0; } void f() { printf("Hi"); }

A. Error: Not allowed assignment
B. Error: Doesn't print anything
C. No error
D. None of above
Answer» B. Error: Doesn't print anything
Discussion
217.

Are the expressions arr and &arr same for an array of 10 integers?

A. Yes
B. No
Answer» C.
Discussion
218.

Which of the following statements mentioning the name of the array begins DOES NOT yield the base address? 1: When array name is used with the sizeof operator. 2: When array name is operand of the & operator. 3: When array name is passed to scanf() function. 4: When array name is passed to printf() function.

A. A
B. A, B
C. B
D. B, D
Answer» C. B
Discussion
219.

Point out the error in the program #include<stdio.h> int f(int a) { a > 20? return(10): return(20); } int main() { int f(int); int b; b = f(20); printf("%d n", b); return 0; }

A. Error: Prototype declaration
B. No error
C. Error: return statement cannot be used with conditional operators
D. None of above
Answer» D. None of above
Discussion
220.

Does this mentioning array name gives the base address in all the contexts?

A. Yes
B. No
Answer» C.
Discussion
221.

A pointer to a block of memory is effectively same as an array

A. True
B. False
Answer» B. False
Discussion
222.

What will be the output of the program? #include<stdio.h> int main() { int x=55; printf("%d, %d, %d n", x<=55, x=40, x>=10); return 0; }

A. 1, 40, 1
B. 1, 55, 1
C. 1, 55, 0
D. 1, 1, 1
Answer» B. 1, 55, 1
Discussion
223.

Which of the following statements are correct about an array? 1: The array int num[26]; can store 26 elements. 2: The expression num[1] designates the very first element in the array. 3: It is necessary to initialize the array at the time of declaration. 4: The declaration num[SIZE] is allowed if SIZE is a macro.

A. 1
B. 1,4
C. 2,3
D. 2,4
Answer» C. 2,3
Discussion
224.

What will be the output of the program ? #include<stdio.h> int main() { int a[5] = {5, 1, 15, 20, 25}; int i, j, m; i = ++a[1]; j = a[1]++; m = a[i++]; printf("%d, %d, %d", i, j, m); return 0; }

A. 2, 1, 15
B. 1, 2, 5
C. 3, 2, 15
D. 2, 3, 20
Answer» D. 2, 3, 20
Discussion
225.

Which of the following statements are correct about 6 used in the program? int num[6];num[6]=21;

A. In the first statement 6 specifies a particular element, whereas in the second statement it specifies a type.
B. In the first statement 6 specifies a array size, whereas in the second statement it specifies a particular element of array.
C. In the first statement 6 specifies a particular element, whereas in the second statement it specifies a array size.
D. In both the statement 6 specifies array size.
Answer» C. In the first statement 6 specifies a particular element, whereas in the second statement it specifies a array size.
Discussion
226.

What will be the output of the program if the array begins at address 65486? #include<stdio.h> int main() { int arr[] = {12, 14, 15, 23, 45}; printf("%u, %u n", arr, &arr); return 0; }

A. 65486, 65488
B. 65486, 65486
C. 65486, 65490
D. 65486, 65487
Answer» C. 65486, 65490
Discussion
227.

What will be the output of the program in Turb C (under DOS)? #include<stdio.h> int main() { int arr[5], i=0; while(i<5) arr[i]=++i; for(i=0; i<5; i++) printf("%d, ", arr[i]); return 0; }

A. 1, 2, 3, 4, 5,
B. Garbage value, 1, 2, 3, 4,
C. 0, 1, 2, 3, 4,
D. 2, 3, 4, 5, 6,
Answer» C. 0, 1, 2, 3, 4,
Discussion
228.

What will be the output of the program ? #include<stdio.h> int main() { int arr[1]={10}; printf("%d n", 0[arr]); return 0; }

A. 1
B. 10
C. 0
D. 6
Answer» C. 0
Discussion
229.

What will be the output of the program? #include<stdio.h> int main() { int k, num=30; k = (num>5 ? (num <=10 ? 100 : 200): 500); printf("%d n", num); return 0; }

A. 200
B. 30
C. 100
D. 500
Answer» C. 100
Discussion
230.

What will be the output of the program? #include<stdio.h> int main() { int i=3; i = i++; printf("%d n", i); return 0; }

A. 3
B. 4
C. 5
D. 6
Answer» C. 5
Discussion
231.

What will be the output of the program? #include<stdio.h> int main() { int i=-3, j=2, k=0, m; m = ++i && ++j || ++k; printf("%d, %d, %d, %d n", i, j, k, m); return 0; }

A. 1, 2, 0, 1
B. -3, 2, 0, 1
C. -2, 3, 0, 1
D. 2, 3, 1, 1
Answer» D. 2, 3, 1, 1
Discussion
232.

What will be the output of the program? #include<stdio.h> int main() { int x=4, y, z; y = --x; z = x--; printf("%d, %d, %d n", x, y, z); return 0; }

A. 4, 3, 3
B. 4, 3, 2
C. 3, 3, 2
D. 2, 3, 3
Answer» E.
Discussion
233.

What will be the output of the program? #include<stdio.h> int main() { int i=2; printf("%d, %d n", ++i, ++i); return 0; }

A. 3, 4
B. 4, 3
C. 4, 4
D. Output may vary from compiler to compiler
Answer» E.
Discussion
234.

What will be the output of the program? #include<stdio.h> int main() { int i=2; int j = i + (1, 2, 3, 4, 5); printf("%d n", j); return 0; }

A. 4
B. 7
C. 6
D. 5
Answer» C. 6
Discussion
235.

What will be the output of the program? #include<stdio.h> int main() { int a=100, b=200, c; c = (a == 100 || b > 200); printf("c=%d n", c); return 0; }

A. c=100
B. c=200
C. c=1
D. c=300
Answer» D. c=300
Discussion
236.

What will be the output of the program? #include<stdio.h> int addmult(int ii, int jj) { int kk, ll; kk = ii + jj; ll = ii * jj; return (kk, ll); } int main() { int i=3, j=4, k, l; k = addmult(i, j); l = addmult(i, j); printf("%d %d n", k, l); return 0; }

A. 12 12
B. No error, No output
C. Error: Compile error
D. None of above
Answer» B. No error, No output
Discussion
237.

What will be the output of the program ? #include<stdio.h> int main() { void fun(int, int[]); int arr[] = {1, 2, 3, 4}; int i; fun(4, arr); for(i=0; i<4; i++) printf("%d,", arr[i]); return 0; } void fun(int n, int arr[]) { int *p=0; int i=0; while(i++ < n) p = &arr[i]; *p=0; }

A. 2, 3, 4, 5
B. 1, 2, 3, 4
C. 0, 1, 2, 3
D. 3, 2, 1 0
Answer» C. 0, 1, 2, 3
Discussion
238.

What will be the output of the program ? #include<stdio.h> void fun(int **p); int main() { int a[3][4] = {1, 2, 3, 4, 4, 3, 2, 8, 7, 8, 9, 0}; int *ptr; ptr = &a[0][0]; fun(&ptr); return 0; } void fun(int **p) { printf("%d n", **p); }

A. 1
B. 2
C. 3
D. 4
Answer» B. 2
Discussion
239.

What will be the output of the program? #include<stdio.h> int fun(int(*)()); int main() { fun(main); printf("Hi n"); return 0; } int fun(int (*p)()) { printf("Hello "); return 0; }

A. Infinite loop
B. Hi
C. Hello Hi
D. Error
Answer» D. Error
Discussion
240.

What will be the output of the program? #include<stdio.h> int fun(int i) { i++; return i; } int main() { int fun(int); int i=3; fun(i=fun(fun(i))); printf("%d n", i); return 0; }

A. 5
B. 4
C. Error
D. Garbage value
Answer» B. 4
Discussion
241.

What will be the output of the program? #include<stdio.h> int fun(int); int main() { float k=3; fun(k=fun(fun(k))); printf("%f n", k); return 0; } int fun(int i) { i++; return i; }

A. 5.000000
B. 3.000000
C. Garbage value
D. 4.000000
Answer» B. 3.000000
Discussion
242.

What will be the output of the program? #include<stdio.h> int main() { float a=0.7; if(a < 0.7f) printf("C n"); else printf("C++ n"); return 0; }

A. C
B. C++
C. Compiler error
D. Non of above
Answer» C. Compiler error
Discussion
243.

What will be the output of the program? #include<stdio.h> int i; int fun1(int); int fun2(int); int main() { extern int j; int i=3; fun1(i); printf("%d,", i); fun2(i); printf("%d", i); return 0; } int fun1(int j) { printf("%d,", ++j); return 0; } int fun2(int i) { printf("%d,", ++i); return 0; } int j=1;

A. 3, 4, 4, 3
B. 4, 3, 4, 3
C. 3, 3, 4, 4
D. 3, 4, 3, 4
Answer» C. 3, 3, 4, 4
Discussion
244.

What will be the output of the program? #include<stdio.h> int func1(int); int main() { int k=35; k = func1(k=func1(k=func1(k))); printf("k=%d n", k); return 0; } int func1(int k) { k++; return k; }

A. k=35
B. k=36
C. k=37
D. k=38
Answer» E.
Discussion
245.

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

A. Print 10
B. Print 20
C. Print 1
D. Compile error
Answer» E.
Discussion
246.

What will be the output of the program? #include<stdio.h> int addmult(int ii, int jj) { int kk, ll; kk = ii + jj; ll = ii * jj; return (kk, ll); } int main() { int i=3, j=4, k, l; k = addmult(i, j); l = addmult(i, j); printf("%d, %d n", k, l); return 0; }

A. 12, 12
B. 7, 7
C. 7, 12
D. 12, 7
Answer» B. 7, 7
Discussion
247.

What will be the output of the program? #include<stdio.h> int fun(int, int); typedef int (*pf) (int, int); int proc(pf, int, int); int main() { printf("%d n", proc(fun, 6, 6)); return 0; } int fun(int a, int b) { return (a==b); } int proc(pf p, int a, int b) { return ((*p)(a, b)); }

A. 6
B. 1
C. 0
D. -1
Answer» C. 0
Discussion
248.

What will be the output of the program? #include<stdio.h> int main() { int fun(int); int i = fun(10); printf("%d n", --i); return 0; } int fun(int i) { return (i++); }

A. 9
B. 10
C. 11
D. 8
Answer» B. 10
Discussion
249.

What will be the output of the program? #include<stdio.h> int check(int); int main() { int i=45, c; c = check(i); printf("%d n", c); return 0; } int check(int ch) { if(ch >= 45) return 100; else return 10; }

A. 100
B. 10
C. 1
D. 0
Answer» B. 10
Discussion
250.

If int is 2 bytes wide.What will be the output of the program? #include <stdio.h> void fun(char**); int main() { char *argv[] = {"ab", "cd", "ef", "gh"}; fun(argv); return 0; } void fun(char **p) { char *t; t = (p+= sizeof(int))[-1]; printf("%s n", t); }

A. ab
B. cd
C. ef
D. gh
Answer» C. ef
Discussion