String in function parameter

Question

int main()
{
        char *x = \"HelloWorld\";
        char y[] = \"HelloWorld\";

        x[0] = \'Z\';
        //y[0] = \'M\';

        return 0;
}

Answer 1

char *arr; above statement implies that arr is a character pointer and it can point to either one character or strings of character

& char arr[]; above statement implies that arr is strings of character and can store as many characters as possible or even one but will always count on '\0' character hence making it a string ( e.g. char arr[]= "a" is similar to char arr[]={'a','\0'} )

But when used as parameters in called function, the string passed is stored character by character in formal arguments making no difference.