Operating System (OS)
Link encryption

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

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Operating System (OS)
Memory management is :

critical for even the simplest operating systems
not used on multiprogramming systems
replaced with virtual memory on current systems
not used in modern operating system
None of these

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