Linux Startup and Shutdown Interview Question:

Do you have any idea what is the output of this program?

#include<stdio.h>
#include<stdlib.h>

int main()
{
int *ptr;
*ptr = 10;
*ptr = 20;
printf("%dn",*ptr);
return 0;
}
a) 10
b) 20
c) segmentation fault
d) none of the mentioned

Submitted by: Murtaza

c) segmentation fault
Explanation:
The segmentation fault occurs because memory for the pointer has not been allocated in this program.
Output:
[root@localhost google]# gcc -o san san.c
[root@localhost google]# ./san
Segmentation fault (core dumped)
[root@localhost google]#
Submitted by: Murtaza