Operating System (OS)
All of the following are task performed by the operating system except

Managing hardware on the computer
Provides an interface for user to interact with computer
Performing housekeeping task like file compression and disk defragmentation
Controlling the access that application program has to the CPU

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Operating System (OS)
The dispatcher

never changes task priorities
puts tasks in I/O wait
actually schedules the tasks into the processor
is always small and simple
None of these

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Operating System (OS)
Backups should be done

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

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