Operating System (OS)
System maintenance:

is necessary on all systems, regardless of how good
None of these
is not required if the system is well written
is usually not necessary
always requires several programs

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Operating System (OS)
Round-robin scheduling

allows interactive tasks quicker access to the processor
allows processor-bound tasks more time in the processor
None of these
gives each task the same chance at the processor
is quite complex to implement

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