Advanced
Operating Systems
Q100 / 100
What is the W^X (write XOR execute) memory protection policy?
Correct! Well done.
Incorrect.
The correct answer is A) A policy ensuring all memory is either writable or executable but never both simultaneously
A
Correct Answer
A policy ensuring all memory is either writable or executable but never both simultaneously
Explanation
W^X (OpenBSD), NX bit (AMD), XD bit (Intel), DEP (Windows): pages are either writable or executable, never both. This prevents code injection attacks where data is written then executed.
Progress
100/100