Operating System (OS)
Under virtual storage,

two or more programs are stored concurrently in primary storage
a single program is processed by two or more CPUs
interprogram interference may occur
None of these
only the active pages of a program are stored in primary storage

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Operating System (OS)
The FIFO algorithm

execute first the job that has been in the queue the longest
None of these
executes first the job with the least processor needs
executes first the job that first entered the queue
executes first the job that last entered the queue

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