31.
What will be the correct output of the following program?
#include<string.h>
void main()
{
   char str[] = "C EXAMINATION", rev[17];
   int i = strlen(str), j=0;
   for( ; i>=0; rev[j++] = str[i--])
   rev[j] =  str[j] ;
   puts(rev);
}

33.
String concatenation means -