Gate CS-2018 Question Paper With Solutions

Q. 52 Consider the following C program:

#include <stdio.h>  void fun1(char *s1, char *s2) {    char *temp;    temp = s1;    s1 = s2;    s2 = temp;  }  void fun2(char **s1, char **s2) {    char *temp;    temp = *s1;    *s1 = *s2;    *s2 = temp;  }  int main() {    char *str1 = "Hi", *str2 = "Bye";    fun1(str1, str2);    printf("%s %s", str1, str2);    fun2(&str1, &str2);    printf("%s %s", str1, str2);    return 0;  }

The output of the program above is

(A) Hi Bye Bye Hi

(B) Hi Bye Hi Bye

(C) Bye Hi Hi Bye

(D) Bye Hi Bye Hi

Answer: (A)

Explanation: