单选题：Assuming a page size of 4 kilobytes and that a page table entry

Assuming a page size of 4 kilobytes and that a page table entry takes 4 bytes, at least how many levels of page tables would be required to map a 64-bit address space if the top level page table fits into a single page?@[B](1)
A. 2
B. 3
C. 6
D. 7




A.2
B.3
C.6
D.7


答案：B