Operating System (OS)
The primary purpose of an operating system is to:

allow people to sue the computers
make the most efficient use of the hardware
None of these
make computer easier to use
keep system programmers employed

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Operating System (OS)
The dispatcher

puts tasks in I/O wait
actually schedules the tasks into the processor
None of these
is always small and simple
never changes task priorities

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Operating System (OS)
Backups should be done

as several incrementals, followed by an image copy
as several image copies, followed by an incremental
None of these
weekly for most installations
daily for most installations

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Operating System (OS)
Object code

is ready to execute
must be "loaded" before execution
None of these
must be rewritten before execution
is the output of compilers, but not assemblers

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