Operating System (OS)
A program

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

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Operating System (OS)
Backups should be done

None of these
daily for most installations
as several image copies, followed by an incremental
weekly for most installations
as several incrementals, followed by an image copy

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