Operating System (OS)
Round-robin scheduling

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

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Operating System (OS)
A spooler is a

Location in memory that maintains the contents of documents until it prints
Queue of print job that are waiting to print
Program that coordinates the print job that are waiting to process
Message sent from the printer to the operating system when a print job is completed

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