Operating System (OS)
A public key encryption system

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

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Operating System (OS)
Thrashing can be avoided if

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

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