The term "stale data" refers to a situation in multi-CPU machines when one thread modifies shared data and a second thread accesses that data later, but sees the data value before the change took place.What is required to guarantee that the second thread sees the updated data, not stale data?
A)The second thread should not try to acquire the lock.
B)The first thread should not try to acquire the lock.
C)Neither thread should use locks.
D)The first thread should release the lock after changing the data.

Question

Quizplus · Accepted Answer

To guarantee that the second thread sees the updated data, the first thread should release the lock after changing the data. This ensures that the second thread can acquire the lock and access the updated data. Option A and B are incorrect as locks are necessary to ensure thread safety. Option C is also incorrect as locks are required to prevent concurrent access to shared data.

The Term "Stale Data" Refers to a Situation in Multi-CPU