The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML? Think carefully about what "effectiveness" means and explain your answer.

The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML? Think carefully about what "effectiveness" means and explain your answer.

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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The If-Modified-Since header can be used to check whether a cached page is still valid. Requests can be made for pages containing images, sound, video, and so on, as well as HTML. Do you think the effectiveness of this technique is better or worse for JPEG images as compared to HTML? Think carefully about what "effectiveness" means and explain your answer.
Homework Part Two If we have 3 frames and the next reference string 1030421320410343210 142 Using the FIFO (First-In-First-Out) repiacement page algorithm determine the number of page faults Using the Optimal replacement page algorithm determine the number of page faults Using the LRU (Least Recently Used) replacement page algorithm determine the number of page faults FIFO 103 0 4 2 1 3 2 0 4 10 3 4 3 2 10 1 4 2 Number of page faults: Optimal 1 0 3 0 4 2 1 3 2 0 4 10 3 4 3 2 1 01 4 2 Number of page faults: LRU 1 0 3 0 4 2 1 3 2 0 4i0 3 4 3 21014 2 Number of page faults: Question 2: Consider the following processes Arrived Process CPU Burst time 6 • Draw a Gantt chart illustrating the execution of these processes using: PI P. 3 Using non preemptive Shortest Job First Algorithm: I Jas! Using preemptive Shortest Job First Algarithm: ai Jasi P. 7 2 Using Round Robin Algorithm with Time Quantum =3: P5 4 Using First-Corme, First-Served (FCFS) Algarithm • calculate waiting time these…
Flaws in segmentation and on the pages themselves are called. Briefly explain the key distinctions between a segmentation fault and a page fault.
Question 21 Consider the following page reference string: 1, 4, 3, 2, 1, 4, 5, 1, 4, 3, 2, 5 In addition, there are 3 frames want to use in the physical memory. how many page faults will occur for the following replacement algorithms: (Please attach a pdf file with one page only to show your answer written by your hand writing). I will not correct this question without your attached pdf file. a. FIFO Replacement algorithm:, b. Optimal Replacement algorithm: c. LRU replacement algorithm:, Use the editor to format your answer
Explain three methods for optimising audio files for the web in a few sentences.
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According to a student, all of the fundamental page replacement algorithms (FIFO, LRU, and optimum) are similar save for the attribute used to select the page to be replaced.What is the FIFO algorithm's aforementioned attribute? What is the LRU method? There's a pptimal algorithm?This page replacement technique has a generic algorithm.
QUESTION 1 v Question Completion Status: Consider the following page reference string: 4, 3, 6, 4, 2, 6, 1, 5, 6, 4 Part (A): Fill in the table using the FIFO replacement algorithm: 4 3 2 Part (B): How many page faults would occur for the following replacement algorithms, assuming three frames were allocated for the process? Number of page faults : Remember that all frames are initially empty, so your first unique pages will cost one fault each. Instructions for the correct way to fill the cells in the table: - If there is no page reference (empty frame), then put a hyphen (-) in the cell and don't leave it as a blank cell. - If the page reference didn't cause a page fault, then put the page number in the cell and without including any asterisks. - In case of a page fault, then put the page number in the cell and include an asterisk next to it, this should be applied to the page number that caused the page fault only. (ex: 2*)
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