Operating System (OS)
System maintenance:

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

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Operating System (OS)
Swapping

does not work with overlaying
allows many programs to use memory simultaneously
allows each program in turn to use the memory
None of these
works best with many small partitions

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Operating System (OS)
A Processor

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

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