What happens when we use arrow operator on NULL structure pointer ?

Question

For eg :

typedef struct Node
{
int data;
struct Node *link;
} Node;

//Pointer to the structure "Node"
Node *start=NULL;

printf("This prints %d",start->data);

Answer 1

Have you tried test running the code inside Code Playground?
It triggers error. Seriously, what did you expect trying to access a pointer that points to a non valid data?