Question

Explain the concept of virtual memory and its importance in modern operating systems. Describe the working of demand paging and how page faults are handled. Provide an example to demonstrate the process.

10 Feb 2025
Answer :
Word Count : 589

Virtual memory is a fundamental concept in modern operating systems that allows a computer to compensate for physical memory shortages by temporarily transferring data from random access memory (RAM) to disk storage. This enables the system to run larger applications and multitask more efficiently than it could with physical memory alone. It creates an "idealized" memory space, where each process appears to have its own contiguous block of memory, even though the physical memory is limited and fragmented. Virtual memory is made possible by a combination of hardware and software, utilizing the memory management unit (MMU) in the CPU and a system called paging.

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