52 52 votes The essential content(s) in each entry of a page table is / are Virtual page number Page frame number Both virtual page number and page frame number Access right information Operating System gatecse-2009 operating-system virtual-memory easy + – Kathleen 19.7k views answer comment Share Follow Print See all 6 Comments 6 6 Comments reply Show 3 previous comments Abhishek-1011 commented Feb 14, 2025 reply Follow flag Source: Here 7 7 replyShare Saquib001 commented Nov 15, 2025 reply Follow flag d) Access right information --> YESTypical rights:R → ReadW → WriteX → ExecuteValid/Invalid bitDirty bitReferenced bitThese control how the page can be used.✔️ Correct AnswerThe essential content(s) in each page table entry are:✔️ Page frame number (PFN)✔️ Access right informationSo correct option:(d) Access right information is essential(b) PFN is also essential but not listed as the ONLY correct answer.If the question expects only one option, usually the answer is:(b) Page frame numberbecause it is the MOST essential mapping information. 1 1 replyShare legend_of_cse commented Sep 24 reply Follow flag References : Tanenbaum 0 0 replyShare Please log in or register to add a comment.
Best answer 42 42 votes It is (B). The page table contains the page frame number essentially. Gate Keeda answered Jan 10, 2015 • edited Jul 13, 2018 by kenzou Gate Keeda comment Share Follow See all 10 Comments 10 10 Comments reply Anjali Sinha commented Jan 4, 2016 reply Follow flag what is the meaning of virtual page number ????? 1 1 replyShare shikharV commented Jan 28, 2016 reply Follow flag I think it refers to address of another page table in case of multilevel page tables. 0 0 replyShare Shiva Chaitanya Gaju commented Feb 3, 2016 reply Follow flag In each page table entry,we usually be having the set of bits like dirty bit, access bit, page is present in memory or not bit,address of the next page table or referencing page, this is essential, which is equivalent to storing up of the address of the reference, i.e physical address. 0 0 replyShare vaishali jhalani commented Oct 6, 2016 reply Follow flag Access right information also stored in page table. Ans should be both B and D. 2 2 replyShare cse23 commented Oct 24, 2016 reply Follow flag if instead of virtual page no, it is simply page number then what will be essential content: only frame no. or bothe page no. and frame no. ???????? 2 2 replyShare Shweta Nair commented Sep 27, 2017 reply Follow flag I think it will still be frame number. Because page no. is just used as an index into the page table, so that the corresponding frame number is obtained. So the essential content will always be the frame number. 14 14 replyShare Nit9 commented Dec 25, 2017 i reshown by Nit9 Jan 8, 2018 reply Follow flag page number is an index, and index is not stored, just like array index is not stored in array data, its simply implied by its location 7 7 replyShare srestha commented Nov 6, 2019 reply Follow flag What about virtual page number? 0 0 replyShare Sarang commented Nov 15, 2020 reply Follow flag only frame numbers are essential because virtual page numbers are used as indices of each page table entry.. 6 6 replyShare shantu commented Nov 27, 2024 reply Follow flag BUT in Inverted Page table Page numbers are stored only with corresponds frame number. AND question is essentially asking about PAGE TABLE ? then which page table should student consider ? 0 0 replyShare Please log in or register to add a comment.
9 9 votes A page table entry contains Present bit Modify bit Other control bits And frame number. And, page number is used to index this table. Hence, B) is essential anytime. Himanshu Kumar 1 answered Oct 1, 2017 • reshown Oct 1, 2017 by Himanshu Kumar 1 Himanshu Kumar 1 comment Share Follow See all 3 Comments 3 3 Comments reply Abhisek Tiwari 4 commented Dec 24, 2018 reply Follow flag page no index to map with corresponding frame no where and how it is stored??? 0 0 replyShare amitqy commented Mar 14, 2019 reply Follow flag Both virtual page number and page frame number---------> why it is wrong? 0 0 replyShare Kuljeet Shan commented Apr 19, 2019 reply Follow flag there is nothing called virtual page number that is saved in page table entry that's why it is wrong @amitqy. 1 1 replyShare Please log in or register to add a comment.
