Operating System (OS)
Memory

None of these
is a sequence of instructions
is the device where information is stored
is a device that performs a sequence of operations specified by instructions in memory.
is typically characterized by interactive processing and time-slicing of the CPU

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Operating System (OS)
Trojan-Horse programs

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

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