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Operating Systems Concepts - Engineering

Q1:

In virtual memory systems, Dynamic address translation

A is the hardware necessary to implement paging

B stores pages at a specific location on disk

C is useless when swapping is used

D is part of the operating system paging algorithm

E None of the above

ANS:A - is the hardware necessary to implement paging

Dynamic address translation, or DAT, is the process of translating a virtual address during a storage reference into the corresponding real address.

DAT is implemented by both hardware and software through the use of page tables, segment tables, region tables and translation lookaside buffers. DAT allows different address spaces to share the same program or other data that is for read only. This is because virtual addresses in different address spaces can be made to translate to the same frame of central storage. Otherwise, there would have to be many copies of the program or data, one for each address space.