Explore topic-wise MCQs in Engineering.

Would the following typedef work?
typedef #include l;

Will the program compile successfully?

#include<stdio.h> int main()
{ printf("India" "BIX n"); return 0;
}

Will the program compile successfully?

#include<stdio.h>
#define X (4+Y)
#define Y (X+3) int main()
{ printf("%d n", 4*X+2); return 0;
}

What will be the output of the program ?

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

In the following program add a statement in the function fact() such that the factorial gets stored in j.

#include<stdio.h>
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 */ }
}

Will the program compile successfully?

#include<stdio.h> int main()
{ #ifdef NOTE int a; a=10; #else int a; a=20; #endif printf("%d n", a); return 0;
}

What will be the output of the program ?

#include<stdio.h> 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;
}

We should not read after a write to a file without an intervening call to fflush(), fseek() or rewind()

If the different command line arguments are supplied at different times would the output of the following program change?

#include<stdio.h> int main(int argc, char **argv)
{ printf("%d n", argv[argc]); return 0;
}

Offset used in fseek() function call can be a negative number.

In a call to printf() function the format specifier %b can be used to print binary equivalent of an integer.

What will be the output of the program ?

#include<stdio.h> int main()
{ char str[20] = "Hello"; char *const p=str; *p='M'; printf("%s n", str); return 0;
}

What will be the output of the program If the integer is 4bytes long?

#include<stdio.h> int main() { int ***r, **q, *p, i=8; p = &i; q = &p; r = &q; printf("%d, %d, %d n", *p, **q, ***r); return 0; } 

In the following program add a statement in the function fun() such that address of a gets stored in j?

#include<stdio.h>
int main()
{ int *j; void fun(int**); fun(&j); return 0;
}
void fun(int **k)
{ int a=10; /* Add a statement here */
}

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ printf("%c n", "abcdefgh"[4]); return 0;
}

What will be the output of the following program in 16 bit platform assuming that 1022 is memory address of the string "Hello1" (in Turbo C under DOS) ?

#include<stdio.h> int main()
{ printf("%u %s n", &"Hello1", &"Hello2"); return 0;
}

What will be the output of the program in Turbo C?

#include<stdio.h> int main()
{ char str[10] = "India"; str[6] = "BIX"; printf("%s n", str); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ char t; char *p1 = "India", *p2; p2=p1; p1 = "BIX"; printf("%s %s n", p1, p2); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ char str1[] = "Hello"; char str2[] = "Hello"; if(str1 == str2) printf("Equal n"); else printf("Unequal n"); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ int i; char a[] = " 0"; if(printf("%s", a)) printf("The string is not empty n"); else printf("The string is empty n"); return 0;
}

What will be the output of the program?

#include<stdio.h>
#define MIN(x, y) (x<y)? x : y;
int main()
{ int x=3, y=4, z; z = MIN(x+y/2, y-1); if(z > 0) printf("%d n", z); return 0;
}

What will be the output of the program?

#include<stdio.h>
#define MESS junk int main()
{ printf("MESS n"); return 0;
}

What will be the output of the program?

#include<stdio.h>
#define MAX(a, b, c) (a>b ? a>c ? a : c: b>c ? b : c) int main()
{ int x; x = MAX(3+2, 2+7, 3+7); printf("%d n", x); return 0;
}

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ char str1[5], str2[5]; int i; gets(str1); gets(str2); i = strcmp(str1, str2); printf("%d n", i); return 0;
}

What will be the output of the program?

#include<stdio.h>
#define PRINT(i) printf("%d,",i) int main()
{ int x=2, y=3, z=4; PRINT(x); PRINT(y); PRINT(z); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ char str[25] = "IndiaBIX"; printf("%s n", &str+2); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main() { char str[] = "Nagpur"; str[0]='K'; printf("%s, ", str); str = "Kanpur"; printf("%s", str+1); return 0; } 

Can a structure can point to itself?

If a char is 1 byte wide, an integer is 2 bytes wide and a long integer is 4 bytes wide then will the following structure always occupy 7 bytes?

struct ex
{ char ch; int i; long int a;
};

What will be the output of the program given below in 16-bit platform ?

#include<stdio.h> int main()
{ enum value{VAL1=0, VAL2, VAL3, VAL4, VAL5} var; printf("%d n", sizeof(var)); return 0;
}

It is not possible to create an array of pointer to structures.

What will be the output of the program ?

#include<stdio.h> int main() { enum days {MON=-1, TUE, WED=6, THU, FRI, SAT}; printf("%d, %d, %d, %d, %d, %d n", ++MON, TUE, WED, THU, FRI, SAT); return 0; } 

What will be the output of the program ?

#include<stdio.h> int main() { int i=4, j=8; printf("%d, %d, %d n", i|j&j|i, i|j&j|i, i^j); return 0; } 

What will be the output of the program in 16-bit platform (under DOS)?

#include<stdio.h> int main()
{ struct node { int data; struct node *link; }; struct node *p, *q; p = (struct node *) malloc(sizeof(struct node)); q = (struct node *) malloc(sizeof(struct node)); printf("%d, %d n", sizeof(p), sizeof(q)); return 0;
}

What will be the output of the program (myprog.c) given below if it is executed from the command line?
cmd> myprog one two three

/* myprog.c */
#include<stdio.h>
#include<stdlib.h> int main(int argc, char **argv)
{ int i; for(i=1; i<=3; i++) printf("%u n", &argv[i]); return 0;
}

If the first value printed by the above program is 65517, what will be the rest of output?

What will be the output of the program ?

#include<stdio.h> int main()
{ struct byte { int one:1; }; struct byte var = {1}; printf("%d n", var.one); return 0;
}

Point out the compile time error in the program given below.

#include<stdio.h> int main()
{ int *x; *x=100; return 0;
}

Point out the error in the program

#include<stdio.h> int main()
{ int a[] = {10, 20, 30, 40, 50}; int j; for(j=0; j<5; j++) { printf("%d n", a); a++; } return 0;
}

stderr, stdin, stdout are FILE pointers

A file written in text mode can be read back in binary mode.

Is there easy way to print enumeration values symbolically?

By default structure variable will be of auto storage class

Is it necessary that the size of all elements in a union should be same?

Will the following declaration work?

typedef struct s
{ int a; float b;
}s;

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

Will the program compile?

#include<stdio.h>
int main()
{ char str[5] = "IndiaBIX"; return 0;
}

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

Will the following program work?

#include<stdio.h> int main()
{ int n=5; printf("n=%*d n", n, n); return 0;
}

The following program reports an error on compilation.

#include<stdio.h>
int main()
{ float i=10, *j; void *k; k=&i; j=k; printf("%f n", *j); return 0;
}

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