Explore topic-wise MCQs in Engineering.

What will be the output of the program?

#include<stdio.h>
int main()
{ int x = 3; float y = 3.0; if(x == y) printf("x and y are equal"); else printf("x and y are not equal"); return 0;
}

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ static char s[] = "Hello!"; printf("%d n", *(s+strlen(s))); return 0;
}

What will be the output of the program ?

#include<stdio.h> int main()
{ static char s[25] = "The cocaine man"; int i=0; char ch; ch = s[++i]; printf("%c", ch); ch = s[i++]; printf("%c", ch); ch = i++[s]; printf("%c", ch); ch = ++i[s]; printf("%c", ch); return 0;
}

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

#include<stdio.h> int main()
{ printf("%d, %d, %d", sizeof(3.0f), sizeof('3'), sizeof(3.0)); 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 empty n"); else printf("The string is not empty n"); return 0; } 

What will be the output of the program If characters 'a', 'b' and 'c' enter are supplied as input?

#include<stdio.h> int main()
{ void fun(); fun(); printf(" n"); return 0;
}
void fun()
{ char c; if((c = getchar())!= ' n') fun(); printf("%c", c);
}

What will be the output of the program ?

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

What will be the output of the program ?

#include<stdio.h> int main() { char *names[] = { "Suresh", "Siva", "Sona", "Baiju", "Ritu"}; int i; char *t; t = names[3]; names[3] = names[4]; names[4] = t; for(i=0; i<=4; i++) printf("%s,", names[i]); return 0; } 

What will be the output of the program ?

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

What will be the output of the program ?

#include<stdio.h> int main()
{ char str[7] = "IndiaBIX"; printf("%s n", str); return 0;
}

Will the expression *p = p be disallowed by the compiler?

Every operator has an Associativity

The expression of the right hand side of || operators doesn't get evaluated if the left hand side determines the outcome.

Two different operators would always have different Associativity.

If char=1, int=4, and float=4 bytes size, What will be the output of the program ?

#include<stdio.h> int main()
{ char ch = 'A'; printf("%d, %d, %d", sizeof(ch), sizeof('A'), sizeof(3.14f)); return 0;
}

What will be the output of the program ?

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

What will be the output of the program ?

#include<stdio.h> int main() { static char mess[6][30] = {"Don't walk in front of me...", "I may not follow;", "Don't walk behind me...", "Just walk beside me...", "And be my friend." }; printf("%c, %c n", *(mess[2]+9), *(*(mess+2)+9)); return 0; } 

In the expression a=b=5 the order of Assignment is NOT decided by Associativity of operators

Associativity of an operator is either Left to Right or Right to Left.

Bitwise & can be used to check if a bit in number is set or not.

If the following structure is written to a file using fwrite(), can fread() read it back successfully?

struct emp { char *n; int age; }; struct emp e={"IndiaBIX", 15}; FILE *fp; fwrite(&e, sizeof(e), 1, fp); 

size of union is size of the longest element in the union

The elements of union are always accessed using & operator

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

#include<stdio.h> int main()
{ char str[20], *s; printf("Enter a string n"); scanf("%s", str); s=str; while(*s != ' 0') { if(*s >= 97 && *s &lt= 122) *s = *s-32; s++; } printf("%s",str); return 0;
}

Which of the following statements are correct about the below declarations?
char *p = "Sanjay";
char a[] = "Sanjay";

Which of the following statements are correct ?

What will be the output of the program ?

#include<stdio.h>
#include<string.h> int main()
{ printf("%d n", strlen("123456")); return 0;
}

Union elements can be of different sizes.

A structure can contain similar or dissimilar elements

The '->' operator can be used to access structures elements using a pointer to a structure variable only

What will be the output of the program ?

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

Point out the error in the program?

#include<stdio.h> int main()
{ struct bits { float f:2; }bit; printf("%d n", sizeof(bit)); return 0;
}

Point out the error in the program?

#include<stdio.h> int main()
{ struct emp { char name[25]; int age; float bs; }; struct emp e; e.name = "Suresh"; e.age = 25; printf("%s %d n", e.name, e.age); return 0;
}

Point out the error in the program in 16-bit platform?

#include<stdio.h> int main()
{ struct bits { int i:40; }bit; printf("%d n", sizeof(bit)); return 0;
}

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample friday tuesday sunday

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

The preprocessor can trap simple errors like missing declarations, nested comments or mismatch of braces.

What will be the output of the program if it is executed like below?
cmd> sample

/* sample.c */ #include<stdio.h> int main(int argc, char **argv) { printf("%s n", argv[argc-1]); return 0; } 

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

/* sample.c */
#include<stdio.h> int main(int argc, char *argv[])
{ int i=0; i+=strlen(argv[1]); while(i>0) { printf("%c", argv[1][--i]); } return 0;
}

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample 1 2 3
cmd> sample 2 2 3
cmd> sample 3 2 3

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

A preprocessor directive is a message from compiler to a linker.

Once preprocessing is over and the program is sent for the compilation the macros are removed from the expanded source code.

What will be the output of the program (myprog.c) given below if it is executed from the command line?
cmd> myprog 1 2 3

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

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample friday tuesday sunday

/* sample.c */
#include<stdio.h> int main(int sizeofargv, char *argv[])
{ while(sizeofargv) printf("%s", argv[--sizeofargv]); return 0;
}

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample friday tuesday sunday

/* sample.c */
#include<stdio.h> int main(int argc, char *argv[])
{ printf("%c", *++argv[2] ); return 0;
}

What will be the output of the program (myprog.c) given below if it is executed from the command line?
cmd> myprog 10 20 30

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

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample "*.c"

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

What will be the output of the program (sample.c) given below if it is executed from the command line?
cmd> sample monday tuesday wednesday thursday

/* sample.c */
#include<stdio.h> int main(int argc, char *argv[])
{ while(--argc>0) printf("%s", *++argv); return 0;
}

If the following program (myproc.c) is present in the directory "C: TC" then what will be output of the program if run it from DOS shell?

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

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

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