Operating System (OS)
The command interpreter

is usually the primary user interface
is menu drive
requires fixed format commands
is quite different from the SCL interpreter
None of these

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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
gives each task the same chance at the processor
is quite complex to implement
None of these

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Operating System (OS)
Data encryption

None of these
is mostly used by financial networks
is mostly used by public networks
cannot be used by private installations
is not necessary, since data cannot be intercepted

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