segmentation fault การใช้

Dereferencing the NULL pointer typically results in an attempted read or write from memory that is not mapped-triggering a segmentation fault or access violation.
It is also possible for the compiler to optimize away the ` NULL ` pointer dereference, avoiding a segmentation fault but causing other undesired behavior.
I think an " invalid page fault " is the same thing as a segmentation fault, in which case it could be many different things.
If it tries to access the memory of a different process it will crash with a segmentation fault ( aka " General Protection Fault " ? ).
Note that the initialization of z will cause a segmentation fault in some languages it would be better placed inside the'Coding Part'block.