Operating System (OS)
Link encryption

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

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Operating System (OS)
Thrashing can be avoided if

the speed of I/O processor is increased
All of these
the speed of CPU is increased
None of these
the pages, belonging to the working set of the programs, are in main memory

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