In Windows 10, the swap file ends with what extension?

• A. .sys
• B. .dll
• C. .tmp
• D. .pag

Answer: (A)

The swap file in Windows is the paging file Windows uses to extend physical memory. It’s named pagefile.sys and has a .sys extension, reflecting its role as a system file used by the operating system for virtual memory management. The other extensions correspond to different file types (for example, .dll for libraries, .tmp for temporary files), so they don’t describe the swap file.