Virtual address space

Question

A one-to-one mapping of the entire physical address space to a process's virtual address space is a correct address translation solution. True/False. Explain.

Comments

yes one to one mapping generally we can see. But as physical address space is less  than virtual address space,so multilevel page table work in this conversion.

But there are certain thing I come to know, that page table size can be different but not page size- is it true?

If it is true, then how last level of page table can be mapped in one page?

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@ srestha, mam

how last level of page table can be mapped in one page?

the size of page table varies, but the last level page-table can not more than one page, but it may be less than the page size===> we can fit the page table into single page but internal fragmentation occurs.

 

A one-to-one mapping of the entire physical address space to a process's virtual address space is a correct address translation solution.

if the entire physical address map to one process, then we can't run other processes... yes one-one correspondence is there but not entire physical address into one process.

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how a whole page table fits in a single page? and that generally occurs too

then page table holds single pages, then how mapping occurs for last level table?

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if the last level age table is more than a page, then we go another level.

we are saying it is last level ==> the size of last page table ≤ Page size

Answer 1

FALSE THERE WOULD BE MORE THAN  1 PROCESS THAT MIGHT BE POINTING TO A  SAME FRAME NO .AND TRANSALATIONS ACTUALLY MEANS SEEING A FRAME NO IN WHICH PAGE NO IS MAPPED ,IT WOULD BE MANY TO ONE .