Operating System (OS)
Link encryption

can not be used in a public network
is more secure than end-to-end encryption
is used only to debug
None of these
is less secure than end-to-end encryption

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Operating System (OS)
All of the following are task performed by the operating system except

Provides an interface for user to interact with computer
Performing housekeeping task like file compression and disk defragmentation
Managing hardware on the computer
Controlling the access that application program has to the CPU

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