CO DEN301_Final Exam_T3 2021.pdf xO File | C:/Users/puspa/Downloads/DEN301_Final%20Exam_T3%202021.pdf+B Page viewA Read aloudT Add text V Draw9 HighlightO Erase 64of 6Questions 4. The key consideration in managing storage performance is to manage throughput. Use yourown words to explain at least three common techniques that we can use to manage storage throughputin virtual systems (5 marks).11:14 AMP Type here to search(?21°CENG7/02/2022近

given- 3 common techniques used to manage storage throughput in virtual systems.

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Engineering

Computer Science

eration in managing storage perfo three common techniques that w

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter12: Secondary Storage Management

Section: Chapter Questions

Problem 1RP

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3. Using the following command: > library(T SA) > data(days) we can retrieve a data file named days in R. The data file contains accounting data from the Winegard Co. of Burlington, Iowa. The data are the number of days until Winegard receives payment for 130 consecutive orders from a particular distributor of Winegard products. (The name of the distributor must remain anonymous for confidentiality reasons.) The time series contains outliers that are quite obvious in the time series plot. (a) Estimate the parameters of an ARMA(1,1) model for these data. (b) Estimate the parameters of an MA(2) model for these data. Which model is a better model for this data set?
Read question properly and give correct answer fastttt within 30 minutes.... will upvote Answer the questions below using the following information: Consider a disk with block size B = 512 bytes. A block pointer is P = 6 bytes long, and a record pointer is PR = 7 bytes long. A file has r = 30,000 EMPLOYEE records of fixed length. Each record hs the following fields: Name (30 bytes), SSN (9 bytes), Department_code (9 bytes), Address (40 bytes), Phone (9 bytes), Birth_date (8 bytes), Sex (1 byte), Job_code (4 bytes), Salary (4 bytes, real number). An additional byte is used as a deletion marker. Suppose that the file is not ordered by the key field SSN and we want to construct a B+-tree access structure (index) on SSN. Calculate: The orders p and pleaf of the B+-treeThe number of leaf-level blocks needed if blocks are approximately 69 percent full (rounded up for convenience)The number of levels needed if internal nodes are also 69 percent full (also rounded up)The total number of blocks…
1.Which of the following is true about a character device? * a)Operating on a character device does not go through Virtual File System b)A character device has a file in /dev directory c)All of the other options are true d)A character device allows read, write and seek operations 2.Which of the following options are true about the critical section (CS) problem? * a)Solution to CS must ensure mutual exclusion to shared data structures. b)Solution to CS must support bounded waiting, but not necessarily starvation c)Solution to CS must be free from deadlocks d)None of the other options are true
Match the correct explanation for the following functions: (ex 1a 2b..) 1. dir() 2. search() 3. getwd() 4. setwd("path") 5. .libPaths() 6. library() a. To get all packages currently loaded in the R enviroment b. To list the files contained in the current working directory c. To get the list of all pages installed d. To change the working directory and specify the path to the desired folder e. To get the library location containing all R packages f. To find out which directory you are currently in
Give explanations, diagrams, disk inode tables, and data blocks like those shown in the PDF to solve the question. (There is no need of coding.) Write an extended version of File System Implementation.You will add content to 40.2 - 40.4 that corresponds to an example file system. The chapter can be found at https://pages.cs.wisc.edu/%7Eremzi/OSTEP/file-implementation.pdf After each section 40.2-40.4 you are going to add an example that shows the following file structures:In 40.1, you will introduce the example, and discuss the files from the perspective of the user.In 40.2-40.4 you will discuss the aspects of that 3 files (and the directories to support them). -rwxr-xr-x /users/<your login>/stuff.sh-rw-r--r-- /users/<your login>/stuff.txt-rw-r--r-- /users/<your login>/stuff/stuff.txt With the following content:stuff.sh#!/bin/bashls -la stuff.txt (1) There is stuff here stuff.txt (2) There is also stuff here
143. What is the full form of LRU (in buffer replacement strategy)? a. Least Reactive User b. Least Recently Used c. Least Read URL d. Lowest Reading User
1) What happens if myfile.txt does not exist? Group of answer choices fopen("myfile.txt", "r") returns FALSE fread("myfile.txt") returns 0 bytes fopen("myfile.txt", "r") creates "myfile.txt" fread("myfile.txt", filesize("myfile.txt")) returns FALSE 2) The mysql command-line tool is used to _____. perform administrative functions in MySQL server access a database without using a username and password connect to any database that exists on the same machine develop websites that need to access a MySQL database 3) Fill in the blank to have this code block display selected information using PDO. $sql = "SELECT itemName, quantity FROM inventory WHERE quantity > 1"; $result = $pdo->query($sql);foreach (_____) { echo "There are $row[quantity] of $row[itemName].<br>\n";} Group of answer choices $result as $row $row = $result->fetch() $row as $result->fetch() $result in $row 4) What MySQL error code is returned when the following SQL statement…
I am having difficulties with reverse geocoding.1) Read the comma-separated file (coords.csv, first table) containing coordinates (latitudes and longitudes), 2) Reverse geocode each coordinate, using the GeoPy - Nominatim reverse geocoding service, and 3) Save the result to a file named "regeo.csv" in an output directory.5) The resulting CSV file, "regeo.csv" should have only six columns displaying Name, Address, City, State, ZIP, and Country (see example below). coords.csv Latitude Longitude 37.365825 -121.932533 37.760816 -122.45099 34.040961 -118.279955 32.732594 -117.182865 38.577309 -121.437613 37.714513 -119.53361 36.416937 -116.969059 33.304015 -115.811139 41.199164 -124.008404 39.120116 -120.061495 format for regeo.csv Name Address City State ZIP County from geopy.geocoders import Nominatim filename = "./data/coords.csv"out_file = "./output/regeo.csv" data = [] with open(filename, 'r') as file: for line in file: line =…
Question #9 Is each of the following an absolute pathname, a relative pathname, or a simple filename? milk_co correspond/business/milk_co /home/max /home/max/literature/promo .. letter.0210 Question #10 Suppose you have a file that is linked to a file owned by another user. How can you ensure that changes to the file are no longer shared? Question #11 If /home/zach/draft and /home/max/letter are links to the same file and the following sequence of events occurs, what will be the date in the opening of the letter? Max gives the command vim letter. Zach gives the command vim draft. Zach changes the date in the opening of the letter to January 31, writes the file, and exits from vim. Max changes the date to February 1, writes the file, and exits from vim. Question #12 What is an inode? What happens to the inode when you move a file within a filesystem? Question #13 The ls –i command displays a filename…
Python: using Beautifulsoup, Pandas and Numpy, Bronx Community College 2019-2020 Men's Basketball Roster https://bronxbroncos.com/sports/mens-basketball/roster Hostor Community College 2019-2020 Men's Basketball Roster https://hostosathletics.com/sports/mens-basketball/roster Scrape data and compile a dataframe of all the names and heights of the players on the men’s Basketball team Find the average height in centimeter each of the 2 dataframes (so you should have 2 averages in total) List the names and the heights of the 5 tallest and the 5 shortest players on each team.
pls check if my unix answers are correct and provide corrections if necessary(commas separate the commands) Move cursor to the last line of the file with one key: G Use one key to move cursor to bottom line of screen: L Move cursor to line 32 with three keys: <32>G Turn on/off line numbers: :set nu , :set nonu Forward/backward one page: ctrl-f , ctrl-b Join the current line with next line: J Replace the whole current line with “abc” with five keys: Append text “abc” at the end of current line: A You just deleted one line by accident. Undo this with one key: u Delete next six lines including current line with three keys: 6dw Delete from cursor to the rest of current line with one key: D Save your changes without quitting vi: :w Delete next five lines from current line and paste them back at the end of the file: 5dd, p Delete next seven characters from cursor with two keys: 7x Swap current char with the next one with just two keys: r<c> Temporarily leave vi as a background…
5 (b) The Image P2.2 has the pricing structure for the Ohio datacenter for Linux "a1.4xlarge" server for Standard 3-Year Term.Assume that the monthly payments are done at the end of the month.Compute the monthly payments' present value and suggest whether the firm should opt for No Upfront or All upfront payment option. Hint: If the monthly payment's present value is more than the upfront payment, you should prefer the upfront payment option. Firm's annualised required rate of return is 10% pa. (i) Write formula in cell C19 to compute the monthly required rate of return.(ii) Enter the values of number of periods, Monthly payments and Type in cells C20, C21 and C23 respectively. (iii) Write a formula in cell C25 to compute the present value of the monthly paments.(iv) In cell C26, select your recommended payment option from the dropdown.