5 votes 5 votes Consider a logical address space of $8$ pages of $1024$ words each, mapped onto a physical memory of $32$ frames. How many bits are there in the physical address and logical address respectively? $5, 3$ $10, 10$ $15, 13$ $15, 15$ Operating System isro2013 operating-system memory-management + – makhdoom ghaya asked May 2, 2016 • retagged Dec 9, 2022 by Lakshman Bhaiya makhdoom ghaya 33.4k views answer comment Share Follow See 1 comment See all 1 1 comment reply Registered user 48 commented Sep 12, 2018 reply Follow Share Why aren't we converting words to bits? Just because nothing is mentioned, we are not assuming anything? 0 votes 0 votes Please log in or register to add a comment.
Best answer 13 votes 13 votes Answer 15, 13 Physical Memory 32 frames = 25 Size of word 1024 = 210 Total Physical Address Space =15 bits Logical Memory 8 pages = 23 Size of word = 210 Total Logical Address Space= 10 +3 = 13 bits srestha answered May 2, 2016 • selected Jun 29, 2016 by Arjun srestha comment Share Follow See all 3 Comments See all 3 3 Comments reply Yash Agrawal 3 commented Jun 17, 2017 reply Follow Share When questions says 8 pages of 1024 words each the why it considered as size of word in solution ? I am confused in the language only that when we use 1024 words it means if each page has 1024 words but how do we understand that it is the size of word? 1 votes 1 votes Registered user 48 commented Sep 12, 2018 reply Follow Share Why aren't we converting words to bits? Just because nothing is mentioned, we are not assuming anything? 0 votes 0 votes Raju Kalagoni commented Nov 27, 2019 reply Follow Share we can't expect same clarity as GATE in ISRO. 10% ~ 20% questions in every ISRO paper would be ambiguous.... 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Given, Logical address space= 8 pages → 2^3 words → offset → 1024 -->2^10 Frames = 32 -->2^5 Logical address = 10 bits + 3 bits = 13 bits Physical address = 10-bits + 5-bits = 15 bits bhumid1212 answered Sep 19, 2022 bhumid1212 comment Share Follow See all 0 reply Please log in or register to add a comment.