Explore topic-wise MCQs in Engineering.

Which of the following statements are correct about the below program?

#include<stdio.h>
int main()
{ int i = 10, j = 15; if(i % 2 = j % 3) printf("IndiaBIX n"); return 0;
}

Is standard library a part of C language?

The itoa function can convert an integer in decimal, octal or hexadecimal form to a string.

The prototypes of all standard library string functions are declared in the file string.h.

scanf() or atoi() function can be used to convert a string like "436" in to integer.

It is necessary that for the string functions to work safely the strings must be terminated with ' 0'.

FILE is a structure suitably typedef'd in "stdio.h".

ftell() returns the current position of the pointer in a file stream.

Data written into a file using fwrite() can be read back using fscanf()

If the two strings are found to be unequal then strcmp returns difference between the first non-matching pair of characters.

What will be the output of the program?

#include<stdio.h> #include<math.h> int main() { float i = 2.5; printf("%f, %d", floor(i), ceil(i)); return 0; } 

What will be the output of the program?

#include<stdio.h> #include<string.h> int main() { char dest[] = {97, 97, 0}; char src[] = "aaa"; int i; if((i = memcmp(dest, src, 2))==0) printf("Got it"); else printf("Missed"); return 0; } 

What will function gcvt() do?

What will be the output of the program?

#include<stdio.h> int main()
{ char c=48; int i, mask=01; for(i=1; i<=5; i++) { printf("%c", c|mask); mask = mask<<1; } return 0;
}

What will be the output of the program ?

#include<stdio.h> int main() { int i=32, j=0x20, k, l, m; k=i|j; l=i&j; m=k^l; printf("%d, %d, %d, %d, %d n", i, j, k, l, m); return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ char ch; if(ch = printf("")) printf("It matters n"); else printf("It doesn't matters n"); 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?

#include<stdio.h> int main()
{ printf("%d >> %d %d >> %d n", 4 >> 1, 8 >> 1); return 0;
}

What will be the output of the program?

#include<stdio.h> int main() { int a=0, b=1, c=3; *((a) ? &b : &a) = a ? b : c; printf("%d, %d, %d n", a, b, c); return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ int k, num = 30; k = (num < 10) ? 100 : 200; printf("%d n", num); return 0;
}

What will be the output of the program?

#include<stdio.h> int main() { int a = 300, b, c; if(a >= 400) b = 300; c = 200; printf("%d, %d, %d n", a, b, c); return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ int x = 10, y = 20; if(!(!x) && x) printf("x = %d n", x); else printf("y = %d n", y); return 0;
}

What will be the output of the program?

#include<stdio.h>
int main()
{ unsigned int i = 65536; /* Assume 2 byte integer*/ while(i != 0) printf("%d",++i); printf(" n"); return 0;
}

Bitwise can be used to perform addition and subtraction.

Bitwise | can be used to set a bit in number.

What will be the output of the program?

#include<stdio.h> int main() { char j=1; while(j < 5) { printf("%d, ", j); j = j+1; } printf(" n"); return 0; } 

What will be the output of the program?

#include<stdio.h> int main() { int i=3; switch(i) { case 1: printf("Hello n"); case 2: printf("Hi n"); case 3: continue; default: printf("Bye n"); } return 0; } 

What will be the output of the program?

#include<stdio.h>
int main()
{ int x, y, z; x=y=z=1; z = ++x || ++y && ++z; printf("x=%d, y=%d, z=%d n", x, y, z); return 0;
}

What will be the output of the program?

#include<stdio.h> #include<stdlib.h> int main() { char *i = "55.555"; int result1 = 10; float result2 = 11.111; result1 = result1+atoi(i); result2 = result2+atof(i); printf("%d, %f", result1, result2); return 0; } 

Left shifting a number by 1 is always equivalent to multiplying it by 2.

In the statement expression1 >> expression2. if expression1 is a signed integer with its leftmost bit set to 1 then on right shifting it the result of the statement will vary from computer to computer

Bitwise & and | are unary operators

Bitwise & can be used to check if more than one bit in a number is on.

Assunming, integer is 2 byte, What will be the output of the program?

#include<stdio.h> int main()
{ printf("%x n", -1>>1); return 0;
}

If an unsigned int is 2 bytes wide then, What will be the output of the program ?

#include<stdio.h> int main() { unsigned int m = 32; printf("%x n", ~m); return 0; } 

Assuming a integer 2-bytes, What will be the output of the program?

#include<stdio.h> int main()
{ printf("%x n", -1<<3); return 0;
}

If an unsigned int is 2 bytes wide then, What will be the output of the program ?

#include<stdio.h> int main()
{ unsigned int a=0xffff; ~a; printf("%x n", a); return 0;
}

What will be the output of the program?

#include<stdio.h> int main()
{ unsigned char i = 0x80; printf("%d n", i<<1); return 0;
}

Bitwise can be used to generate a random number.

Bitwise | can be used to set multiple bits in number.

Bitwise can be used to reverse a sign of a number.

Bitwise & can be used in conjunction with ~ operator to turn off 1 or more bits in a number.

On left shifting, the bits from the left are rotated and brought to the right and accommodated where there is empty space on the right?

Left shifting an unsigned int or char by 1 is always equivalent to multiplying it by 2.

What will be the output of the program?

#include<stdio.h>
int main()
{ char str[]="C-program"; int a = 5; printf(a >10?"Ps n":"%s n", str); return 0;
}

Bitwise & can be used to divide a number by powers of 2

What will be the output of the program?

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

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ static char str1[] = "dills"; static char str2[20]; static char str3[] = "Daffo"; int i; i = strcmp(strcat(str3, strcpy(str2, str1)), "Daffodills"); printf("%d n", i); return 0;
}

What will be the output of the program?

#include<stdio.h>
int main()
{ int a = 500, b = 100, c; if(!a >= 400) b = 300; c = 200; printf("b = %d c = %d n", b, c); return 0;
}

What will be the output of the program?

#include<stdio.h>
int main()
{ unsigned int i = 65535; /* Assume 2 byte integer*/ while(i++ != 0) printf("%d",++i); printf(" n"); return 0;
}