Operating System (OS)
Backups should be done

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

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Operating System (OS)
Multiprogramming systems:

are easier to develop than single programming system
execute each job faster
execute more jobs in the same time period
are used only on large mainframe computers
None of these

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