Operating System (OS)
Trojan-Horse programs

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

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Operating System (OS)
Which of the following is not a characteristic of a daisy chaining priority control scheme?

priority is programmable
the failure of one device may affect other devices on the chain
it is relatively easy to add more devices to the chain
None of these
the number of control lines is independent of the number of devices on the chain

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Operating System (OS)
A public key encryption system

allows only the correct receiver to decode the data
does not encode the data before transmitting it
None of these
allows anyone to decode the transmission
allows only the correct sender to decode the data

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