Question

2" | Page # (10 pts)On a machine with 8 bytes page size, given the page table for a process, and 2 of these 4 entries are mapped to page frames. Frame 0 starts at physical 0 address 0. (All numbers given are in decimal.) a. What are the range(s) of logical address (decimal, byte-level) that would cause 2 a page fault? | Frame # 4 Not in main memory Not in main memory b. Convert the following logical address (decimal, byte-level) to physical address (decimal, byte-level)? If not possible, specify the reason. 20-> 24>

Answer 1

Solution:

a)

Page size = 8 byte

offset => 2^3 = 3 bits for page offset

a)

pages 1 and 3 are not in the main memory which means if any request to these pages will come then it will be a page fault

b)

20=> in binary 10100

10 is the page number and 100 is page offset

2 is referencing to 1

which means physical address will be 001 100

24=> in binary 11000

11 is the page number and 000 is the page offset

the page 3 is not in the memory

This means it is a page fault.

7 in binary is 111

This is 0th page and 111 is the page number

so,

physical page address will be 4 111=> 100 111

I hope this helps if you find any problem. Please comment below. Don't forget to give a thumbs up if you liked it. :)