A computer has four page frames. The timeof loading, time of last access and the R andM bits for each page are as shown below (thetimes are in clock ticks).PageLoaded Last refRM1262791230260112027211316028011Which page will LRU replace?

Answered: A computer has four page frames. The…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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A process refers to 5 pages, A, B, C, D, E in the order : A, B, C, D, A, B, E, A, B, C, D, E. If the page replacement algorithm is FIFO, the number of page transfers with an empty internal store of 3 frames is : Select one: a.9 b.10 c.8 d.7
Consider the following page address stream: 2 1 4 3 5 3 2 4 5 2 1 2 4 3 1 Which of the following causes the most page faults to occur on a machine with 3 frames? Scheme that causes the most faults: a) First in First out b) LRU and FIFO are the same number of faults c) FIFO and Opitimal are the same number of faults d) All have the same number of faults e) Least Recently Used f) No faults occurs g) LRU and Optimal are the same number of faults h) Optimal NUMBER OF FAULTS CAUSED: a)
Using the following page replacement algorithms, determine the number of faults in the following reference string given a physical memory size of 4 frames: 5 6 5 4 4 4 8 2 9 9 0 4 5 3 9 6 8 1 9 1 6 1 0 0 5 OPT. 3 frames
This is what my professor said: Items are 4 bytes, pages are 2k, so ~512 items fit on a page. Even if we start in the beginning of a page, the first access will be a miss followed by ~200 hits, then a TLB miss followed by ~500 hits, so the hit rate is ~100%5. Page size 512 means 9 bits of offset and 7 bits of VPN. The offset is just the decimal version of 1 0111 0111 [unsigned] which is 375The offset is 0011 100 which is 28. Is he correct?
Using the following page replacement algorithms, determine the number of faults in the following reference string given a physical memory size of 4 frames: 5 6 5 4 4 4 8 2 9 9 0 4 5 3 9 6 8 1 9 1 6 1 0 0 5 Replacement algorithm 3 frames FIFO OPT LRU LFU MFU
Give an example of how to minimize the translation table when flash storage must convert huge ranges of consecutive logical page numbers into physical page numbers. Fast archiving:
An entry in a page table points to a page frame in memory, what if two entries in a page table points to same page frame? Does this effect copy large amount of data? Can updating one page effect other page?
Consider a program with seven virtual pages numbered from 0 to 6 references its pages in the order:0 1 3 6 2 4 5 2 5 0 3 1 2 5 4 1 0Using clock page replacement algorithm with 4 frames and assuming demand paging, compute the number of page faults and show the state of frames (pages in frames and value of clock bit) after each page access.
What is Translation Look-Aside Buffer used in paging? answer a)It is a memory that is searched when a page is not found in page table b)It is part of the physical memory to hold process control blocks c)It is a bank of special registers inside the processor d)It is an associative memory that can do parallel frame search in hardware
A process refers to 5 pages, 1, 2, 3, 4, 5 in the order : 4,1,0,4,2,1,3,4,2,5,2,1,0,4,3,5,2,0,1,4. If the page replacement algorithm is FIFO, the number of page fault with an empty internal store of 3 frames is?
With the same physical memory and the same initial page assignments as in question 1, how many page faults will occur If LRU page replacement is used ? Assume the reference string (RS) is the same 0172327103? Time t 0 1 2 3 4 5 6 7 8 9 10 RS 0 1 7 2 3 2 7 1 0 3 Frame 0 0 Frame 1 1 Frame 2 2 Frame 3 3
A computer has four page frames. The time of loading, time of last access, and the R and M bits for each page are as show (the times are in clock ticks): Page Loaded Last ref. R M 0 126 280 1 0 1 230 265 0 1 2 140 270 0 0 3 110 285 1 1 At the time of page fault which page will be replaced by following algorithms: 1. FIFO 2. LRU 3. Second chance

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A computer has four page frames. The time of loading, time of last access and the R and M bits for each page are as shown below (the times are in clock ticks). Page Loaded Last ref M 126 279 1 230 260 1 2 120 272 1 1 3 160 280 1 1 Which page will LRU replace?