C Quiz

1)What is the output of this C code?

#include <stdio.h>

int main()

{

char *str = “hello, world”;

char *str1 = “hello, world”;

if (strcmp(str, str1))

printf(“equal”);

else

printf(“unequal”);

}

2)What does the following declaration mean?

int (*ptr)[10];

3)What will be output if you will compile and execute the following c code?

void main(){

int i=320;

char *ptr=(char *)&i;

printf(“%d”,*ptr);

}

4)Which  function sets first n characters of a string to a given character?

5)How will you print \n on the screen?

6)The library function used to find the last occurrence of a character in a string?

7)What is the output of this C code?

#include <stdio.h>

void main()

{        char *s = “hello”;

char*p = s;

printf("%p\t%p", p, s);

}

8)What is the output of this C code?

#include<stdio.h>

int main()

{

char str[]="c4learn";

printf("%d",*(str+strlen(str)));

return(0);

}

9)What is the output of this C code?

#include<stdio.h>

void main()

{

char arr[5*2/2] = {'a','b','c','d','e'};

printf("%c",arr[3]);

}

10)What is the output of this C code?

intmain()

{

    intarr[5];

   

    // Assume that base address of arr is 2000 and size of integer

        // is 32 bit

    arr++;

    printf("%u", arr);

   

    return0;

}

11)Output of following program?

# include <stdio.h>

voidfun(int*ptr)

{

    *ptr = 30;

}

intmain()

{

  inty = 20;

  fun(&y);

  printf("%d", y);

  return0;

}

12)What is the output of following program?

#include<stdio.h>

voidswap(char*str1, char*str2)

{

  char*temp = str1;

  str1 = str2;

  str2 = temp;

}

 

intmain()

{

  char*str1 = "Geeks";

  char*str2 = "Quiz";

  swap(str1, str2);

  printf("str1 is %s, str2 is %s", str1, str2);

  return0;

}

13)What is the return type of malloc() or calloc()?

14)Output of following program?

intmain()

{

  inta[] = {1, 2, 3, 4, 5, 6};

  int*ptr = (int*)(&a+1);

  printf("%d ", *(ptr-1) );

  return0;

}

15)Predict the output?

intmain()

{

 char*ptr = "GeeksQuiz";

 printf("%c\n", *&*&*ptr);

 return0;

}

16) syntax for the function strpbrk();?

17)syntax for the function memset();?

18)write the syntax of the function exit();?

19)what function is used to find the absolute value of an integer?write the syntax.

20)is there any standard library function to perform binary search,if it is write the syntax and write where it is?