Microsoft Certified Solutions Developer (MCSD) Certification Practice Test

How can a thread that is not continuing be removed from the Barrier wait?

1. Call the RemoveParticipant method

2. Invoke the Unregister method

3. Employ the Cancel method

4. Call the Leave method

The correct answer is: Call the RemoveParticipant method

The correct approach to remove a thread that is not continuing from a Barrier wait involves managing the participants within the Barrier structure. Using the RemoveParticipant method is essential for this process. This method allows a thread that is currently waiting at a Barrier to exit the waiting state, effectively enabling you to handle scenarios where a participant may no longer be able to proceed. When you invoke RemoveParticipant, it specifically removes the thread from the Barrier's list of active participants, which is critical for maintaining the integrity of the synchronization process. In contrast, other methods mentioned may not serve the same purpose or might not be applicable in this context. The Unregister method, for instance, suggests a different approach to managing participant lifecycle but does not directly target the removal of a thread from an ongoing wait state in the Barrier. The Cancel method typically deals with interrupting operations but does not specifically manage participants waiting on a Barrier. Lastly, the Leave method indicates a general action of exiting but does not focus on the synchronization aspect managed by the Barrier's participant list. Therefore, using the RemoveParticipant method ensures a clean and appropriate way to manage the participation of threads in a Barrier, maintaining order and proper synchronization among concurrent operations.