1 votes 1 votes In Page Table,page-frame address entries are static or Dynamic means whether they are changed or not??(Consider 1-level page table) Operating System operating-system memory-management virtual-memory self-doubt + – lalitver10 asked Oct 21, 2021 lalitver10 551 views answer comment Share Follow See all 3 Comments See all 3 3 Comments reply Chandrabhan Vishwa 1 commented Oct 22, 2021 reply Follow Share yes page table entries of a process page table are dynamic changes means if process size is more than RAM so some pages are in Harddisk or any which is slow device than RAM if refer page number frame entires not in RAM then page fault occure so when place the page in RAM mean main memory then pagetable entry changes according to where process page is placed in main memory so it is dynamic changes 1 votes 1 votes lalitver10 commented Oct 22, 2021 reply Follow Share Hii @chandrabhan, Thanks For your response. I have one more doubt related to default value(address) of frame number in page table entries when valid/invalid bit is set invalid. 0 votes 0 votes Awe111 commented Oct 22, 2021 reply Follow Share @lalitver10 Valid indicates that the associated page is in the logical address space. Invalid indicates that the associated page is not in logical address space... Both valid-invalid bit and the modify bit / Dirty Bit are stored in a page table .. A dirty bit or modified bit is a bit that is associated with a block of computer memory and indicates whether or not the corresponding block of memory has been modified. Most machines keep dirty bits in page table entry … 1. https://gateoverflow.in/137320/os-virtual-memory-valid-invalid-bit-vs-modify-bit-doubt 2. https://gateoverflow.in/?qa=blob&qa_blobid=5106651230149583426 1 votes 1 votes Please log in or register to add a comment.