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 about the various features present in ms access, Microsoft access h...

Microsoft access has vast advantages for a programmer and end user. Some of the advantages are ? Relative compatibility with SQL and VBA. ? Microsoft SQL server desktop engi

Why is the wait-for-memory-function-completed, Why is the Wait-For-Memory-F...

Why is the Wait-For-Memory-Function-Completed step required when reading from or writing to the main memory? WMFC step is needed for the write control signal / read control si

How is EISA bus different from ISA bus, How is EISA bus different from ISA ...

How is EISA bus different from ISA bus? Extended Industry Standard Architecture (EISA) is a 32 bit modification to ISA bus. As computers became larger and had wider data buses,

Staircase, What is the aim of a stair case light is controlled by two switc...

What is the aim of a stair case light is controlled by two switches one at the top of the stairs and another at the bottom of the stair

Security, We now consider the relation between passwords and key size. For ...

We now consider the relation between passwords and key size. For this purpose consider a cryptosystem where the user enters a key in the form of a password. Assume a password consi

Linux, Explain about unix file system architecture

Explain about unix file system architecture

Describes the phases of sdlc, Software Development Life Cycle (SDLC):- SDLC...

Software Development Life Cycle (SDLC):- SDLC (System Development Life Cycle) is a well-defined process by which a system is conceived developed and implemented. In other sense a S

What are the limitations of traditional payment instruments, What are the l...

What are the limitations of traditional payment instruments? The limitations of traditional payment system are that they take a lot of time.  These systems needs manual work to

Scope of supply chain management consultancy, What are included in scope of...

What are included in scope of Supply Chain Management Consultancy? Supply Chain Management Consultancy's scope is extensive, and classically includes as given here: a. Sales

Truth tables, Any function can be expressed in a truth table.A truth table ...

Any function can be expressed in a truth table.A truth table lists all possible combinations ofinputs and gives the output produced in eachcase.Truth tables must include all combin

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