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

Vector-vector instructions-vector processing, Vector-Vector Instructions ...

Vector-Vector Instructions In this type, vector operands are fetched by the vector register and saved in another vector register. These instructions are indicated with the foll

Explain problem-oriented and procedure-oriented language, Explain differenc...

Explain difference between Problem-oriented and procedure-oriented language. Problem-oriented and procedure-oriented language: The programming languages which can be utilized

What do you mean by resolution, Q. What do you mean by Resolution? Reso...

Q. What do you mean by Resolution? Resolution is parameter which defines possible sharpness or clarity of a video image.  Resolution is defined as number of pixels which make u

Colour technologies used in monitors and printer, Q. Which Colour technolog...

Q. Which Colour technologies used in Monitors and Printer? Monitor screens and Printers use different colour technologies.  The monitor uses RGB and the Printer CMYK. So, how d

Conjunctive normal forms, Conjunctive Normal Forms: However there for ...

Conjunctive Normal Forms: However there for the resolution rule to resolve two sentences so they must both be in a normalised format called as conjunctive normal form, that is

Explain a public key encryption system, Explain a public key encryption sys...

Explain a public key encryption system? A public key encryption system permits only the correct receiver to decode the data.

Responsibilities of objects, The Transaction object is responsible for read...

The Transaction object is responsible for reading the transaction file, finding the relevant account in the array of customers and applying the transaction. To find the relevant ac

Perform on occurrence of an interrupt, Q. Perform on occurrence of an inter...

Q. Perform on occurrence of an interrupt? Determining these requirements let's work out steps that CPU should perform on occurrence of an interrupt. The CPU should find

Command mode using vi editor, What does the c$ command do from command mode...

What does the c$ command do from command mode using Vi Editor? Ans) C$ will start from the character under the curser till the finish of line. So when you use this command it wi

Computer to computer transmission of structured data, Computer to computer ...

Computer to computer transmission of structured data using standardised documentation is known as Electronic data interchange (EDI).

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