Operating System (OS)
Trojan-Horse programs

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

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Operating System (OS)
Which of the following is true for machine language.

None of these
A sequence of instructions which, when followed properly, solves a problem
Repeated execution of program segments
the language which communicates with the computer using only the binary digits 1 and 0.
Depicting flow of data in a system

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