what is a virtual memory?

Answer 1

"Virtual memory is a common part of most operating systems on desktop computers. It has become so common because it provides a big benefit for users at a very low cost.

Most computers today have something like 64 or 128 megabytes of RAM (random-access memory) available for use by the CPU (central processing unit). Often, that amount of RAM is not enough to run all of the programs that most users expect to run at once. For example, if you load the Windows operating system, an e-mail program, a Web browser and word processor into RAM simultaneously, 64 megabytes is not enough to hold it all. If there were no such thing as virtual memory, your computer would have to say, "Sorry, you cannot load any more applications. Please close an application to load a new one." With virtual memory, the computer can look for areas of RAM that have not been used recently and copy them onto the hard disk. This frees up space in RAM to load the new application. Because it does this automatically, you don't even know it is happening, and it makes your computer feel like is has unlimited RAM space even though it has only 32 megabytes installed. Because hard-disk space is so much cheaper than RAM chips, virtual memory also provides a nice economic benefit." (http://computer.howstuffworks.com/question684.htm)

Answer 2

Here is a complete answer:

http://www.helpero.com/Questions-and-answers/Computers/Windows/What-is-virtual-memory-How-can-I-increase-it_1716.html

Helpero is a web site that helps every Internet user, from all over the world, solve any computer related problem. You can ask Helpero for free.

Answer 3

virtual memory belongs to computer.if virtual memory is low in your system the process of the system slows down and cannot save more files.to increase virtual memory you have to change ram in you system

Answer 4

Virtual memory technique provides dynamic migration of portions of address spaces between primary & secondary memory in acco-
rdance with their usage.....

Answer 5

Virtual memory is part of OS. It will use when your RAM is full. It will use as RAM, takes your HDD space to do

Answer 6

This is better information than I can give:
http://computer.howstuffworks.com/virtual-memory.htm

Answer 7

its the achievement of physical memory which is not actually available to computer
in a simpler way its is as using a part of easily acessible hard disk as ram so that the ram size seems to be increased without actually increasing the ram size

Answer 8

http://www.en.wikipedia.org/wiki/Virtual_memory