Operating System (OS)
Under virtual storage,

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

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Operating System (OS)
A spooler is a

Program that coordinates the print job that are waiting to process
Location in memory that maintains the contents of documents until it prints
Message sent from the printer to the operating system when a print job is completed
Queue of print job that are waiting to print

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