Discussion
Statement I: a binary semaphore may be used as a lock. Statement II: a binary semaphore records which task took it.
Answer: B
Correct answer: the first statement is true and the second is false
A binary semaphore can certainly be used as a lock, and often is. What it does not do is record who took it, so it cannot support priority inheritance and cannot detect a release by the wrong task. Those are precisely the reasons a mutex exists as a separate object.
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