In C runtime environment, which one of the following is stored in heap?

Consider the following C program :

#include <stdio.h>
void stringcopy(char *, char *);
int main( ) {
    char a[30] = "@#Hello world!";
    stringcopy(a,a+2);
    printf("%s\n", a);
    return 0;
}
void sringcopy(char *s, char *t) {
    while(*t)
        *st++ = *t++;
}

Which ONE of the following will be the output of the program?

Consider the following C function definition.

 int fX(char *a) {

   char *b = a; 

   while(*b) 
        b++; 

   return b - a; }  

Which of the following statements is/are TRUE?

What is printed by the following ANSI C program?

#include <stdio.h>
int main(int argc, char *argv[ ]) {
   int x = 1, z[2] = {10, 11};
   int *p = NULL;
   p = &x;
   *p = 10;
   p = &z[1];
   *(&z[0] + 1) += 3;
   printf("%d, %d, %d\n", x, z[0], z[1]);
   return 0;
}