Operating System (OS)
Memory management is :

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

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Operating System (OS)
The LRU algorithm

pages out pages that have not been used recently
pages out pages that have been least used recently
pages out the first page in a given area
None of these
pages out pages that have been used recently

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Operating System (OS)
A program

is a device that performs a sequence of operations specified by instructions in memory.
is the device where information is stored
None of these
is typically characterized by interactive processing and time of the CPU
is a sequence of instructions

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