Read and write to a memory location

Question

After doing lot of research in Google, I found below program

#include 

int main()
{
    int val;
    char *a = (char*) 0x1000;
          


        

Answer 1

You can write to a specific memory location.

But only when you have the rights to write to that location.

What you are getting, is the operating system forbidding you to write to 0x1000.