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).Page LoadedLast ref1262792302601202721116028011(i)Which page will FIFO replace?12 3

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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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?
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)
A computer system has 4 page frames. The table below shows the time of loading, thetime of last access, and the R and M bits for each page (the times are in clock ticks).Frame Loaded Last access R M0 136 320 1 01 240 305 0 02 105 375 1 13 290 300 0 1For each of the algorithms below, determine which page is going to be replaced:(a) rst-in, rst-out (FIFO);(b) least recently used (LRU);(c) not recently used (NRU);(d) second chance.
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
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
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
Consider the following page address stream: 2 4 2 4 1 2 5 1 3 3 1 Using the Least Recently Used algorithm on a machine with 4 frames, which page address will cause the first fault? a) 1 b) No fault occurs c) 2 d) 3 e) 5 f) 4
Given references to the following pages by a program: 4, 2, 3, 9, 3, 2, 5, 4, 6, 3, 5, 4, 9, 3, 6, 9, 4, 6, 3, 1, 6, 1, 2, 1. Question: Determine the number of page faults if the program has 4 frames available to it and uses: a. Clock algorithm = b. Second-chance algorithm =
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:
44. What does the reciever use to extract frames from the bit stream?a. reverse lookupb.character stuffingc. MAC paddingd. Big endian
Consider a reference string: 1,2,3,4,1,2,5,1,2,3,4,5. the number of frames in the memory is 3. Find out the number of page faults , page faults ratio and page hit ratio with respective to: Optimal Page Replacement Algorithm FIFO Page Replacement Algorithm LRU Page Replacement Algorithm
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?

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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).