Operating System (OS)
A spooler is a

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

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Operating System (OS)
System maintenance:

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

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