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C Program GATE 2018 -7

Consider the following C program:

#include<stdio.h>
 
void fun1(char *s1, char *s2){
     char *tmp;
     tmp = s1;
     s1 = s2;
     s2 = tmp;
}
void fun2(char **s1, char **s2){
     char *tmp;
     tmp = *s1;
     *s1 = *s2;
     *s2 = tmp;
}
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