Operating System (OS)
Which of the following addressing modes, facilitates access to an operand whose location is defined relative to the beginning of the data structure in which it appears?

sorting
index
None of these
ascending
indirect

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Operating System (OS)
Semaphores

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

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