Operating System (OS)
Boot startup process

Loads system files to RAM
Clean up the computer memory
Checks the computer connections
Prepare the computer ready

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Operating System (OS)
Trojan-Horse programs

are hidden programs that do not show up on the system
usually are immediately discovered
are legitimate programs that allow unauthorized access
do not usually work
None of these

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Operating System (OS)
The dispatcher

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

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