Computer Question

M

Molality

New Member
Hello,

A friend came to me who is studying computers, I think he is in CIS 115 or something low like that. He came to me because he doesn't a lot about searching on the internet or in his book for that matter.

The question he asked me through me off as I thought RAM is shareable.

The question is, as text to me "Processes or application cannot share the same memory (ram) space. The document says that the operating system has to isolate memory spaces or addresses for each application. Why or what are the consequences if it does not."

I tried searching but can't anything that answers the question. I think it might have something to do with virtual memory.

Thank you all for your time and help,
Molality
 
Imagine you had a book and every time you looked at a new page the text was printed on top of the old text, very soon it would be unreadable.

Memory (RAM) is divided in pages (blocks) so the original page does not get lost.

When that program or section is finished the memory is recovered.

The easiest way to see this in action is to download a program called MEMTEST (memory Tester) where you can see the memory display being tested on the screen.

Virtual memory is when there is not enough memory (RAM) to do the job and the data is written to the harddrive as a temperory measure, however this is a lot slower the RAM (Random Access Memory) , the other type of memory in your computer is ROM (Read only Memory) and the contents of this are fixed at creation and cannot normally be changed

Terry
 
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