Operating System (OS)
Semaphores

synchronize critical resources to prevent deadlock
None of these
synchronize critical resources to prevent contention
are used to do I/O
are used for memory management

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Operating System (OS)
Which of the following is not true about documentation?

None of these
Documentation, of a system, should be as clear and direct as possible
All of these
Documentation increases the maintenance time and cost
Documentation gives better understanding of the problem

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