Final answer:
Multilevel page tables are a Computers and Technology concept used in memory management to save space by breaking down the address space into a hierarchy of smaller tables, reducing the required memory footprint by only keeping parts of the table that are in use.
Step-by-step explanation:
The concept of multilevel page tables is a memory management scheme that is pertinent to the subject of Computers and Technology. It is designed to minimize the amount of memory required to store page tables in a system, thereby saving space. In a single-level page table, each process requires a page table that is as large as the number of pages in its virtual address space, which can be quite vast. A multilevel page table breaks this down into smaller tables, creating a hierarchical structure. This hierarchy means that only the parts of the page table that are in use need to be kept in memory, significantly reducing the amount of space required. For example, a two-level page table splits the address space into segments. Each segment is represented by an outer page table, which then points to an inner page table with the actual mappings for that segment. If a particular segment is not being used, its associated inner page table does not need to reside in memory.