3. Many systems use a technique called paging.

6. The mandate of this exception is gonna determinate the origen of the situation and it has to solve if this is possible.

7. To access a page If there is a fault if are there frames free? To allocate the frame to the page To upload the frame if this necessary To link the frame to the page table Else To choose the frame to replace Save the frame if it's modified Unlink the frame of the page table ( and it's gotten a frame free ) To allocate the frame to the page To upload the frame if this necessary To link the frame to the page table MMU To access a memory If Is this page? To allocate the bit of reference If Writing? To actualize the bit of modification Else To change the address Else A page fault is gotten Check if the access is legal Getting a page free To upload the frame if this necessary To allocated the free frame to the process To set the bit of reference To allocate the bit of reference If Writing? To actualize the bit of modification Else To change the address

12. This more used on Linux. Although, it is being replaced by Ext4.

14. It consumes a low percentage of CPU resources and it's considered the safer file system than other Linux's file system.

16. Extents

17. Backward compatibility

18. Persistent pre-allocation

19. Delayed allocation

20. Break 32000 subdirectory limit

21. Journal checksumming

22. Faster file system checking

23. Multiblock allocator

24. Improved timestamps