Describe the working principle of demand paging in virtual memory management.

  • Load entire process into memory at once
  • Load pages into memory based on a fixed schedule
  • Load pages into memory only when needed
  • Rapid access to frequently used pages
Demand paging is a virtual memory management technique where pages are loaded into memory only when they are required, thus optimizing memory utilization. When a process is initiated, only essential pages are loaded initially. As the process executes and requires more pages, they are fetched from secondary storage. This approach minimizes initial load time and allows for more efficient use of available memory.
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