CS Professional · Artificial Intelligence, Data Analytics and Cyber Security - Laws and Practice · Computer Hardware and Software
An IT manager at an Indian firm notices that a system with limited RAM keeps running large programs by temporarily moving inactive portions of them to a reserved area on the hard disk. What is this technique called?
The technique is virtual memory. The operating system uses a reserved disk area as an extension of RAM and swaps inactive program pages in and out, allowing programs larger than physical memory to run. Cache is fast memory near the CPU, and defragmentation merely reorganises stored files.
- AVirtual memoryCorrect
- BCache memory
- CFirmware shadowing
- DDisk defragmentation
Explanation
Virtual memory lets the operating system use disk space as an extension of RAM by swapping inactive pages out. Cache memory is a small fast memory near the CPU. Defragmentation only rearranges file fragments on disk and does not extend memory.
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