Explain virtual memory, Computer Engineering

Assignment Help:

In a memory hierarchy system, data and programs are first stored in secondary or auxiliary memory. Program and its related data are brought in main memory for execution. What if the size of Memory needed for Program is more than the size of memory? Virtual memory is a idea used in some large computer systems which allow user to construct programs as though a large memory space were available, equal to total of secondary memory. Every address produced by CPU goes through an address mapping from so-called virtual address to a physical address in main memory. Virtual memory is employed to give programmers the illusion that they have a very large memory at their disposal although computer in fact has a relatively small main memory. A Virtual memory system offers a mechanism for translating program-generated addresses in correct main memory locations. This is done dynamically whereas programs are being executed in CPU. The translation or mapping is handled automatically by hardware through a mapping table.


Related Discussions:- Explain virtual memory

Explain the storage class static, Explain the Storage Class Static Th...

Explain the Storage Class Static The Storage Class Static : Static declarations have two important and distinct uses. The more elementary use is to allow a local variable to

What do you mean by instruction pipelining, After considering instruction e...

After considering instruction execution let's now describe a concept which is very popular in any CPU implementation. This conception is instruction pipeline.  To extract better

Example on passing parameters through stack, Q. Example on Passing Paramete...

Q. Example on Passing Parameters through Stack? PROGRAM: Version 3 DATA_SEG               SEGMENT                         BCD DB 25h; Storage for BCD test value BIN

What is parallel sections construct, What is Parallel Sections Construct? ...

What is Parallel Sections Construct? The parallel sections construct is a shortcut for specifying a parallel construct comprising one sections construct however no other statem

Facsimile , FACSIMILE : This is often known as 'fax' and it represents the...

FACSIMILE : This is often known as 'fax' and it represents the interface between reprographic and computer technology. By using fax, the contents of a sheet of paper (text or illu

Compares a pair of characters entered by keyboard, Program: This program c...

Program: This program compares a pair of characters entered by keyboard. ; Registers used: AX, BX, CX, DX DATA SEGMENT                          XX DB?

What is computer communications networks, Q. What is Computer communication...

Q. What is Computer communications networks? Computer communications networks are the outcome of a combination of computers and telecommunication products. An interconnected gr

How do you get workflow automation in e-business environment, How do you ge...

How do you get workflow automation into e-business environment? In order to run smoothly, organizations frequently standardize processes across the organization and support use

What do you mean by program counter, Q. What do you mean by Program Counter...

Q. What do you mean by Program Counter? Program Counter (PC): It determines the instruction that is to be executed next which means after the execution of an on-going instructi

What is virtual memory, What is virtual memory? Virtual memory is a met...

What is virtual memory? Virtual memory is a method used in some large computer systems that allow the user to construct program as by a large memory space were available, equal

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd