Operating System (OS)
Memory management is :

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

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Operating System (OS)
A page fault

is a reference to a page belonging to another program
is an access to a page not currently in memory
is an error is a specific page
None of these
occurs when a program accesses a page of memory

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