Strings - General Questions

What will be the output of the program?

#include <stdio.h>
#include <string.h>

int main(void) {
    printf("%d\n", strcmp("apple", "apple"));
    return 0;
}

What will be the output of the program?

#include <stdio.h>
#include <string.h>

int main(void) {
    char a[20] = "abc";
    char b[] = "xyz";
    strcpy(a, b);
    printf("%s\n", a);
    return 0;
}

What will be the output of the program?

#include <stdio.h>
#include <string.h>

int main(void) {
    printf("%zu\n", strlen("C\0Language"));
    return 0;
}

What will be the output of the program?

#include <stdio.h>

int main(void) {
    char s[] = "Hello";
    int i;
    for (i = 0; s[i]; i++) s[i] = s[i] + 1;
    printf("%s\n", s);
    return 0;
}

What will be the output of the program?

#include <stdio.h>
#include <string.h>

int main(void) {
    printf("%d\n", strcmp("abc", "abd") < 0);
    return 0;
}