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In general what is paging? and segmaentation?
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Answer Posted / rekha
paging:In computer operating systems, paging is one of the
memory-management schemes by which a computer can store and
retrieve data from secondary storage for use in main
memory. In the paging memory-management scheme, the
operating system retrieves data from secondary storage in
same-size blocks called pages.
segmantation:In a computer system using segmentation, an
instruction operand that refers to a memory location
includes a value that identifies a segment and an offset
within that segment. A segment has a set of permissions,
and a length, associated with it. If the currently running
process is allowed by the permissions to make the type of
reference to memory that it is attempting to make, and the
offset within the segment is within the range specified by
the length of the segment, the reference is permitted;
otherwise, a hardware exception is raised.
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