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It
is a technique that allows the execution of a
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process
without having to allocate it the
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memory
space that it needs, completely.
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Various
parts of a process are swapped into
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memory
as they become needed during
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execution.
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Advantages:
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Programs
can be larger than the size of the physical
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memory.
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virtual
memory provides a logical view of a memory
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that
is larger than its physical size.
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Demand
Paging:
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Most
virtual memory systems use paging.
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A
page is not swapped into memory until it is needed
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