what do u mean bu virtual memory and what will it do in the case of computers?

Answer 1

Virtual memory is just that. Your system has physical memory which is the amount of RAM. When that is not enough for your running programs you system emulates RAM by swapping out programs that are in RAM but not currently used to an equal amount of space on the hard drive. This frees up RAM for your current program . When you access the memory that has been swapped out it must re-read it from the disk and load it back into RAM and potentially swap something else to the disk. All computers do this but if they do it excessively your computer will be really slow and you will notice a ton of disk activity

Answer 2

virtual memory increases the efficiency of the RAM but since virtual memory is a paging size, it is dependent to the size of the hd.

paging is the process of saving inactive virtual memory pages to disk and restoring them to real memory when required.

Virtual memory is a computer system technique that giving an application program the impression that it has adjacent working memory, when in fact it is physically fragmented and may even overflow on to disk storage. Systems which use this technique make programming of large applications easier and use real physical memory (e.g. RAM) more efficiently than those without virtual memory.

Note that "virtual memory" is not just "using disk space to extend physical memory size". Extending memory is a normal consequence of using virtual memory techniques, but can be done by other means such as overlays or swapping programs and their data completely out to disk while they are inactive.

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

Answer 3

Virtual memory

Virtual memory is a computer system technique which gives an application program the impression that it has contiguous working memory, while in fact it is physically fragmented and may even overflow on to disk storage. Systems which use this technique make programming of large applications easier and use real physical memory (e.g. RAM) more efficiently than those without virtual memory.

Note that "virtual memory" is not just "using disk space to extend physical memory size". Extending memory is a normal consequence of using virtual memory techniques, but can be done by other means such as overlays or swapping programs and their data completely out to disk while they are inactive. The definition of "virtual memory" is based on tricking programs into thinking they are using large blocks of contiguous addresses.

All modern general purpose computer operating systems use virtual memory techniques for ordinary applications, such as word processors, spreadsheets, and multimedia players. Older operating systems, such as DOS of the 1980s, or many mainframe operating systems of the 1960s, had no virtual memory functionality.

Embedded systems and others in which very fast, very consistent response time is essential do not generally use virtual memory.

Answer 4

Virtual memory is a computer system technique which gives an application program the impression that it has contiguous working memory, while in fact it is physically fragmented and may even overflow on to disk storage. Systems which use this technique make programming of large applications easier and use real physical memory (e.g. RAM) more efficiently than those without virtual memory

Answer 5

You can increase your virtual memory by

Answer 6

vertual memory is not pement memory .when there is shortfall in use the memory of ram computer i.e. cpu uses some part of hard disk as a ram memory .for only that running program .and after this end of program end of use of hd is automaticaly cancelled

Answer 7

Did you read an article on HowStuffWorks?

http://computer.howstuffworks.com/virtual-memory.htm

Answer 8

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

Answer 9

NOT ENOUGH RAM,GET COMBOFIX