“Segmentation fault” vs “run time” error? [duplicate]

Answer 1

It is a segmentation fault. Also does it come under run time memory error ?

Strictly speaking, its an undefined behavior. You may or may not get segmentation fault. Any thing could happen.

Declaring

char *str = "hellow Ghost";  

is equivalent to

char const *str = "hellow Ghost";  

String literals are stored in read-only section and any attempt to modify it invokes UB.

C11: J.2 Undefined behavior:

The behavior is undefined in the following circumstances:
...
— The program attempts to modify a string literal (6.4.5).