What is virtual memory ? Why is it called virtual ? Whats the area of hard disk where pages are replaced to, called?

Question

Accepted Answer

Virtual memory is a memory management technique that allows the operating system to use a combination of RAM and hard disk space.

Virtual memory is a way for the operating system to provide more memory to applications than what is physically available in RAM.
It creates an illusion of a larger memory space by using a portion of the hard disk as an extension of RAM.
Virtual memory allows multiple processes to run simultaneously without the need for physical memory to accommodate all of them.
When a program needs more memory than what is available in RAM, the operating system swaps out less frequently used pages from RAM to the hard disk.
The area of the hard disk where these pages are stored is called the swap space or page file.

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