GATE - 2001 | OS | Consider a machine with 64 MB physical memory and a 32-bit virtual

GATE - 2001 | OS | Consider a machine with 64 MB physical memory and a 32-bit virtual
Posted on 25-02-2022

GATE - 2001 [Operating System]

Questions:

Consider a machine with 64 MB physical memory and a 32-bit virtual address space. If the page size is 4 KB, what is the approximate size of the page table?

A

16 MB

B

8 MB

C

2 MB

D

24 MB

Solution:

Option (C) is Correct.

No. of entries in pge table = 232/ 212 = 220
Frame size = 226 / 212 = 214
PT have to be stored in one frame so entry size must be 2 bytes, hence size of PT = 220 * 2 = 2 MB

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