Operating System (OS)
The function(s) performed by the paging software is (are)

None of these
Implementation of the access environment for all programs in the system
Management of the physical address space
All of these
Sharing and protection

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Operating System (OS)
Memory management is :

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

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