Operating System (OS)
A Processor

is a device that performs a sequence of operations specified by instructions in memory.
None of these
is the device where information is stored
is typically characterized by interactive processing and time of the CPU
is a sequence of instructions

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Operating System (OS)
Under virtual storage,

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

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