Operating System (OS)
The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk, is known as

caching
None of these
virtual programming
multiprogramming
spooling

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Operating System (OS)
Semaphores

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

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Operating System (OS)
Fork is

the creation of a new process
increasing the priority of a task
the dispatching of a task
the creation of a new job
None of these

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