Under what conditions are locks unnecessary for multi-threaded programs?
A)When the threads are all of the same class.
B)When the threads are different classes.
C)When the threads do not share data.
D)When the shared data only has a single method.

Question

Quizplus · Accepted Answer

Locks are used to ensure thread safety and prevent multiple threads from accessing and modifying the same data simultaneously. If the threads do not share any data, then there is no need for locks as there will be no race conditions or data inconsistencies. Therefore, option C is the correct choice. Option A is incorrect because even if the threads are of the same class, they could still access and modify shared data. Option B is also incorrect because the classes of the threads do not determine whether or not locks are necessary. Option D is incorrect because even if there is only a single method for accessing and modifying the shared data, multiple threads could still access it simultaneously, leading to race conditions.

Under What Conditions Are Locks Unnecessary for Multi-Threaded Programs