If a system has 128 mb ram and 1 gb hard disk, and a process decides to use its fully allotted virtual memory 2^32 - 2gb = 2 gb, how is it practically possible?. But this works in all machines. How?
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Answer Posted / Shiv Poojan Yadav
The misconception arises due to the difference between physical memory (RAM) and virtual memory (a combination of RAM and disk space). In modern operating systems, a process's addressable memory can extend beyond the available physical memory by using virtual memory management techniques such as paging and segmentation. Virtual memory allows the OS to simulate more memory than physically available by swapping out less frequently used pages between RAM and the hard drive.
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