Operating System (OS)
Interprocess communication

allows processes to synchronize activity
None of these
is required for all processes
is never necessary,
is usually done via disk drives

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Operating System (OS)
Operating system

None of these
provides a layered, user-friendly interface
links a program with the subroutines it references
All of these
enables the programmer to draw a flowchart

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Operating System (OS)
The LRU algorithm

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

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