Discussion
A multilevel page table is preferred in comparison to a single level page table for translating virtual address to physical address because :
Answer: B
Correct answer: it helps to reduce the size of page table needed to implement the virtual address space of a process
A single-level table needs an entry for every page whether or not it is used, which for a large address space is enormous. A multilevel table pages the table itself, so only the parts actually in use need exist. It does not make access faster - each level is another memory reference.
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