What is Virtual Memory?

• A. The capability of an operating system to temporarily store data on a storage medium until it can be swapped into RAM
• B. A type of RAM
• C. A memory that stores the BIOS
• D. A storage area on the CPU cache

Answer: (A)

Virtual memory is the ability of an operating system to use disk storage as an extension of RAM, temporarily holding data and program code until it can be loaded into physical memory. This lets programs use more memory than what is physically installed by moving less-active data to a storage medium (like a hard drive or SSD) and bringing it back when needed. The OS keeps track of these moves with structures like page tables, and the hardware supports address translation and paging so virtual addresses map to physical locations. Because memory is backed by disk, you gain a larger, isolated address space for each process and better multitasking, though access can be slower when pages need to be swapped in. It’s not a type of RAM, not memory for the BIOS, and not a cache area in the CPU.