Which page in main memory does the process' page 4 map to?

Asked Jan 11 '22 at 08:16

Active Jan 11 '22 at 08:22

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Got a question:

A process has the following page table.

Valid Bit     Page

   
    0        -
    1        3
    0        -
    0        -
    1        2
    1        0
    0        -
    1        1

Which page in main memory does the process' page 4 map to?

Select one:

a. 4

b. 2

c. 0

d. Page 4 of the process is not stored in main memory

e. None of the above

I would have thought it was (d) since (3,2,0,1) are valid and 4 is not present. But the answer is 2 apparently and I don't see why?

What is the mistake in this solution:

https://i.stack.imgur.com/6nBYY.jpg

edited Jan 11 '22 at 08:22

asked Jan 11 '22 at 08:16

Jade

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1

Assuming page 0 is at the top and page 7 is at the bottom, then page 4 (the fifth page) will map to in-memory page number `2`. – Some programmer dude Jan 11 '22 at 08:19
uploaded a pic of the solution: https://imgur.com/a/HCc0kmu (what is the mistake here) @Someprogrammerdude – Jade Jan 11 '22 at 08:26

0 Answers0