GCFA Question #82: Real Exam Question with Answer & Explanation

The correct answer is C. Virtual memory. Virtual memory is the technique where the OS extends apparent RAM by using hard disk space as an overflow area, swapping memory pages between RAM and disk as needed.

Question

Normally, RAM is used for temporary storage of data. But sometimes RAM data is stored in the hard disk, what is this method called?

Options

ACache memory
BStatic memory
CVirtual memory
DVolatile memory

Explanation

Virtual memory is the technique where the OS extends apparent RAM by using hard disk space as an overflow area, swapping memory pages between RAM and disk as needed.

Common mistakes.

A. Cache memory is a small, fast layer of memory (typically SRAM) placed between the CPU and main RAM to store frequently accessed data - it does not involve the hard disk.
B. Static memory (SRAM) refers to a type of semiconductor RAM that holds data without needing periodic refresh cycles - it is a hardware characteristic, not a memory management technique.
D. Volatile memory describes any memory that loses its stored data when power is removed, such as RAM itself - this is a property of a memory type, not a technique for extending storage to disk.

Concept tested. Virtual memory and page file concepts

Reference. https://learn.microsoft.com/en-us/troubleshoot/windows-client/performance/how-to-determine-the-appropriate-page-file-size-for-64-bit-versions-of-windows

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