Question: The virtual memory manager uses a page replacement algorithm to select one of the pages currently in memory for replacement, accesses the page table entry of the selected page to mark it as “not present” in memory and initiates a ________operation for it if the modified bit of its page table entry indicates that it is dirty page.
Answer:
MCQ: The virtual memory manager uses a page replacement algorithm to select one of the pages currently in memory for replacement, accesses the page table entry of the selected page to mark it as “not present” in memory and initiates a ________operation for it if the modified bit of its page table entry indicates that it is dirty page.
Correct Answer:
A. Page hit
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Related Questions
- 1. The virtual memory manager initiates a _____ operation to load the required page into the page frame that was occupied by the selected page and it updates the page table entry of the page to record frame number of the page frame, marks the page as “present” and makes provision to resume operation of the process.
- 2. Page-in and page-out operations are required to implement demand paging constitutes _______
- 3. Which of the following stands true for Effective memory access time for a process in demand paging?
- 4. Which of the following stands true for Effective memory access time for a process in demand paging?Where <strong><em>pr<sub>1</sub></em></strong><sub> </sub>= probability that a page exists in memory, <strong><em>t<sub>mem</sub></em></strong> = memory access time , <strong><em>t<sub>pfh</sub></em></strong> = time overhead of page fault handling
- 5. Which of the following stands true for Effective memory access time for a process in demand paging? Where <strong><em>pr<sub>1</sub></em></strong><sub> </sub>= probability that a page exists in memory, <strong><em>t<sub>mem</sub></em></strong> = memory access time , <strong><em>t<sub>pfh</sub></em></strong> = time overhead of page fault handling
- 6. Page replacement becomes necessary when <ol> <li>Page faults occur and there are no free page frames in the memory.</li> <li>Page faults occur and there are free page frames in the memory.</li> <li>Page faults would arise if the replaced page is referenced again.</li> <li>It is important to replace a page that is not likely to be referenced again in the immediate future.</li> </ol>
- 7. Which of the following statements stands true for locality of reference in page replacement and handling page faults?
- 8. The computer exploits the law of locality to ensure__________
- 9. How much memory should the virtual memory manager allocates to a process depends on which of the below factors?
- 10. When a process is operating in low memory allocation and has high page fault rate, this process spends a lot its time in the ____________
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