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What do you mean by Virtual Memory? Write down its advantages?

Virtual memory is a computer system memory management technique that enables a computer to use more memory than is physically available by temporarily transferring data from the computer’s RAM (Random Access Memory) to a hard disk or other storage device. It is a memory management technique that allows a computer to compensate for shortages of physical memory by temporarily transferring pages of data from RAM to disk storage.

The primary advantage of virtual memory is that it allows programs to execute even if there is insufficient physical memory available. This is because virtual memory enables the system to temporarily store inactive data on a hard drive, freeing up more RAM to be used by active processes. Virtual memory also makes it possible for large programs or multiple programs to run simultaneously, which can improve overall system performance.

Other advantages of virtual memory include:

1. Increased efficiency: Virtual memory reduces the need for frequent disk access, which can be slower than RAM access. By using virtual memory, a computer can access the data it needs more quickly and efficiently.

2. Improved system stability: Virtual memory can help prevent crashes and system freezes by allowing the system to continue operating even when it runs out of physical memory.

3. Simplified programming: With virtual memory, programmers can write programs that require more memory than is available, without having to manage the details of swapping data in and out of memory.