Operating System (OS)
Trojan-Horse programs

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

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Operating System (OS)
A real time operating system is most likely to be used for which of the following task?

Managing the access to system files in a laptop computers
Ensuring that system clock works correctly on server
Controlling access to a shared printer in a network
Controlling the fuel injection system of an automobile engines

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