Q1. Explain Multilevel Page Table.
Ans.The multilevel page table method is to avoid keeping all the pages tables in memory all the time. The top level page table with 1024 entries corresponding to the 10 bits PTL (Page Table Length Filed). When a virtual address is presented to the memory management unit (MMU), it first extracts the PTL (Page Table Length Filed), and uses this value as an index into the top level page table.
Figure: A two-level page table scheme