1. Virtual Memory
when ever a program require more main memory, if your system doesn't have require memory, then system use memory from hard disk. But it is slow compare to main memory. data stored in virtual memory must be mapped back to main memory when ever it's to be used.
when ever a program require more main memory, if your system doesn't have require memory, then system use memory from hard disk. But it is slow compare to main memory. data stored in virtual memory must be mapped back to main memory when ever it's to be used.
Really good stuff
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