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ISRO | ISRO CS 2007 | Question 27

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Virtual memory is
(A) Part of Main Memory only used for swapping
(B) A technique to allow a program, of size more than the size of main memory, to run
(C) Part of secondary storage used in program execution
(D) None of these

Answer: (B)

Explanation: Virtual Memory is a storage allocation scheme in which secondary memory can be addressed as though it were part of main memory. The addresses a program may use to reference memory are distinguished from the addresses the memory system uses to identify physical storage sites, and program generated addresses are translated automatically to the corresponding machine addresses.
Virtual memories are incorporated to eliminate the setback of smaller RAMS with a larger process size. It allows the execution of the programs larger than the size of main memory.

Refer: Virtual Memory

Option (B) is correct.

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Last Updated : 28 Jun, 2018
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