Swap Space Function

What this virtual memory interview question tests

This is a foundational question on operating systems that checks whether you understand the role of secondary storage in virtual memory architecture. Swap space (or backing store) is a critical concept for systems engineers and anyone working on memory management, and firms building infrastructure or trading systems expect candidates to grasp how physical memory extends beyond RAM.

The question probes whether you can distinguish between logical and physical memory, explain why systems need overflow mechanisms, and describe the trade-offs involved. A solid answer demonstrates understanding of page tables, page faults, and the cost of accessing disk versus cache.

• Virtual vs. physical address spaces
• Page replacement policies and eviction
• Latency impact of disk I/O on performance
• Memory overcommitment and resource management