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System Programming Quiz System Programming

What does this code do: BOOL sharedLockSuccess = NO; NSLock *aMutex; : sharedLockSuccess = [aMutex lockWhenCondition:1 beforeDate:[NSDate dateWithTimeIntervalSinceNow:(NSTimeInterval)3600]]; :

A mutex is being set to be locked upon a specific condition
A mutex is tried to be locked within a specific time
A mutex is being set to be locked at a specific time
A mutex is tried to be locked with a specific condition

Answer:
A mutex is tried to be locked within a specific time

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