Explore topic-wise MCQs in Engineering.

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;
}

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; } 

What will be the output of the program ?

#include<stdio.h> int main()
{ printf(5+"IndiaBIX n"); return 0;
}

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; } 

Point out the error in the program?

struct emp
{ int ecode; struct emp e;
};

Maximum number of arguments that a function can take is 12

Which of the following sentences are correct about a switch loop in a C program?

Functions cannot return a floating point number

Every function must return a value

Will the following functions work?

int f1(int a, int b)
{ return ( f2(20) );
}
int f2(int a)
{ return (a*a);
}

A function cannot be defined inside another function

Functions cannot return more than one value at a time

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

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

Functions can be called either by value or reference

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");
}

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

Which of the following statements mentioning the name of the array begins DOES NOT yield the base address?

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;
}

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

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

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;
}

Which of the following statements are correct about an array?

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;
}

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

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; } 

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;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ int arr[1]={10}; printf("%d n", 0[arr]); return 0;
}

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;
}

What will be the output of the program?

#include<stdio.h>
int main()
{ int i=3; i = i++; printf("%d n", i); return 0;
}

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; } 

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;
}

What will be the output of the program?

#include<stdio.h>
int main()
{ int i=2; printf("%d, %d n", ++i, ++i); return 0;
}

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; } 

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; } 

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;
}

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; } 

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);
}

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;
}

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;
}

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;
}

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; } 

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; 

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;
}

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);
}

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;
}

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));
}

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++);
}

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;
}

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);
}