If the two strings are identical, then strcmp() function returns

If the two strings are identical, then strcmp() function returns

2) What will be the output of the program ?

 #include<stdio.h>
 int main()
 {
     int i;
     char a[] = "\0";
     if(printf("%s", a))
         printf("empty string\n");
     else
         printf("not empty string \n");
     return 0;
 }

3) Which is more appropriate for reading in multi-word string?

4) What will be the output of the program ?

  #include<stdio.h>
  int main()
 {
     printf("Study 2 Online", " C Language MCQ\n");
     return 0;
 }

5) What is the output of this C code?

#include <stdio.h>
     int main()
     {
         char *str = "hello, world\n";
         printf("%d", strlen(str));
       }