Operating System (OS)
The primary job of the operating system of a computer is to

manage resources
provide utilities
be user friendly
command resources
None of these

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Operating System (OS)
A public key encryption system

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

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Operating System (OS)
Memory management is :

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

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