Translate which address?

Understanding address translation in operating systems

This question tests your grasp of a foundational OS concept: why and how operating systems mediate access between application code and physical memory. Address translation is central to memory management, protection, and the illusion of isolated address spaces that each process enjoys.

To answer well, you should be able to articulate the core motivations behind translation—isolation, relocation, and efficient resource use—and explain how the OS and hardware work together to enforce them. The question probes whether you understand the boundary between logical and physical memory, and why that boundary matters for security, flexibility, and multi-process execution.

• Virtual vs. physical address spaces
• Memory protection and process isolation
• Hardware-software cooperation in address mapping
• Page tables and translation lookaside buffers (TLBs)