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Files on a computer are the electronic version of paper files that would lie stacked up to eye-level height on an office desk or take up endless cabinets in a chilled records room in the 40s. Like paper documents, files are ways of storing and passing information along. In computer terms, they are durable in that they exist beyond the running of a current program.

Today, almost all operating systems organizes their files into one-dimensional arrays of bytes. The format of a file can be found by looking at it's file extension - e.g. .jpegs are images and .txt are text files. Many programs have file extensions entirely their own, but file formats created by the most popular programs are usually widely supported. For example, a Microsoft Word .doc file can be read by many non-Microsoft programs. Most file formats also keep a few bytes for tracking basic information about themselves, such as creation dates, last edit dates, size, etc. This type of information is called metadata

25 common file extension icons

Example file extensions

The most fundamental two file operations are read and write. Reading here, simply means opening the file (you may have come across files marked as 'read-only' which is a way of preventing interference with the file's data) while writing means changing the contents of the file. Write operations are done at the time of saving a file which, with the recent move toward auto-saving, has become a very often and speedy occurrence. However, depending on the file format, one may also delete, move, grow, shrink, translate and perform many other types of operations on a file. When creating a program, it is important to keep in mind which operations will be needed in the files your program will be working with, so you can decide or create a suitable file type and system of manipulating them.

Excel Data Extraction

b. Filter the list and start the results in cell H6. You are to display sales which were greater than fifty-five units and whose per-unit price was no larger than $3.15 during 2005. Display in the body of the table the total sales for each salesperson. c. Filter the list and copy to v2 to display those 2012 return were great

Excel help with Grade Chart

Using your cursor, highlight the course names and the data that is next to them. Click on Insert > Charts, and select "Column Chart." Click on the chart, and select "Cut." Go to the bottom of your spreadsheet, and select Sheet 2. Click on a cell within that sheet. On Sheet 2, paste the chart you just copied. On the tabs at

Transporation model in excel, using solver

The Southern Rail Company ships coal by rail from three coal mines to meet the demand requirements of four coal depots. The following table shows the distances from the mines to the various depots and the availabilities and requirements for coal. Determine the best shipment of coal cars to minimize the total miles traveled by th

Unix command to sort a file based on a certain column numerically

Please see the attached file for the complete problem. Please help me with this programming question: Create a single command string that will modify the file called myfile and change all occurrences of the ! to a :. The command string must also sort the file numerically on the GID field and then save the output to a file cal

How can I share a large computer file?

You are sitting at your desk at work, using your laptop computer. The boss calls an emergency meeting for you and several coworkers, and asks everyone to bring his or her laptop computer. When you get to the meeting room, the boss wants to download an important file from his laptop to all your coworker's laptops. List three pos

Internet Speeds: LAN and WAN

Consider the following two scenarios (1) two computers are connected to a LAN using a total of twenty feet of cable, and (2) two computers are connected over the Internet and are 8000 miles from each other. Now imagine that the two computers in each scenario need to exchange 1000 messages between themselves in order to transfer

Load Data Local Infile Problem With MYSQL.

I created a database called "genomicdb" in MYSQL server with two tables: "gene" and "location". The tables are supposed to be populated with data from .txt files. One of the files, "gene.txt", works fine and populates fine in the table. But the other file, "location.txt", is skipping rows. Below is the code that I am using. I a

Coding in Java

The history teacher at your school needs help grading a True/False test. The students' IDs and test answers are stored in a file. The first entry in the file contains the answers to the test form: TFFTFFTTTTFFTFTFTFTT Every other entry in the file is the student's ID, followed by a blank, followed by the student's respons

Design a relational database in MS Access 2010

Design a relational database containing information about music performers, their recordings, and the composers of the music they recorded. The following elements must be included: - Database file contains at least three tables. - Relationships between the tables are shown. - Each table contains three or more attributes.

Information technology question

XYZ Inc. has a small office with 80 users in California. The office employs a file and print server that caters to user requests. Recently users have complained that it takes a lot of time to retrieve files from the server. In addition users have also complained that at times it takes a while to service print requests. A n

Create a HTML page with following tags: fieldset, form, input, label, legend, optgroup, option, textarea, button, select. The webpage contains a form that collects information from the user and emails it to an email address.

Create a HTML page using the following guidance. 1. The following tags are used: fieldset, form, input, label, legend, optgroup, option, textarea, button, select. 2. The webpage contains a form that collects information from the user and emails it to an email address. 3. All web pages used are styled using a common exte

Creating and Validating HTML files

Create a HTML page that must satisfy the following requirements: 1. Document Validates as XHTML 1.0 Strict. 2. The page is titled with the student's name. 3. All of the following tags are used: p, b, i, hr 4. 3 of the following tags are used: h1, h2, h3, h4, h5, h6, br 5. Code Comments are used to identify the location o

Visual C-Sharp program for an Ice Cream Shop

Create a Visual C-Sharp program for an Ice Cream Shop. The program will store data about ice cream cones and customers. Create a Cone class that includes a choice of ice cream or yogurt, the flavor, the number of scoops and type of cone. This class should also include static data members for the cost per scoop (.50), cost p

Professional Issues in Computing

Would you help me to get started with the following: Describe how the two types of assets are valued for balance sheet purposes, using the following assets owned by a company that writes and sells software packages (about 500 words): a. The company has a stock of 500 user manuals for version 1 of a "package" version 2 of

Why would or would not you use Internet storage?

You would like to save the digital pictures you took on vacation onto your hard drive, but it would take up too much storage space. You have heard you can increase your computer's storage capacity by using Internet storage. Explain what is Internet storage. Write down all the reasons why you would or would not use Internet s

Java Programming deploying Inheritance

Define a class named Document that contains an instance variable of type String named text that stores any textual content for the document. Create a method named toString that returns the text field and also include a method to set this value. Next, define a class for Email that is derived from Document and includes member v

VB 08 - Three Web Forms

Create an MS Access database called MemberLedger.mdb. Add a table called Members with the following columns. (Already done, see attachment). For clarification, the instructions for the assignment require the creation of the MemberLedger.mdb database. The database should be created and saved as an Access 2007 database with the

List files in a directory using a Shell Script

I'm trying to create a shell script that will list files in a directory. Here are the other requirements: -The files must be listed in sorted order by the file name. -By default, the program displays only file names. -By default, the program lists the files in the current directory. The program must provide the followin

Compiler Construct Projects

Compiler Construct In the first part of the project, you need implement a simple lexical analyzer using C++ 1. Input is a text file with source code in it. 2. Space, tab, new line and comment (/* .... */) should be ignored by the lexical analyzer 3. The lexical analyzer should be able to identify a) Integer literals,

Linux Project. (Unable to install Red Hat Linux on my Computer)

PLEASE RECORD ALL OUTPUT IN A WORD DOC Project 2-9 Use vi to create a data file with records. You will then sort the data. * Log in to the Linux system as a user, and then open a Terminal emulation window. * Type mkdir Project2-9, and then press Enter. * Type cd Project2-9, and then press Enter. * Type vi infile

Explaining how to assign work groups

Explain how you would create the users for the sales organization unit and how to set up work groups in this particular situation. Keep in mind that you may have to name certain applications and allowable tasks for each individual or job role. Creating Users 1. To create a user in the ACMExx.COM domain, right-click the ACM


I need help. Please help 1. Create a Client/Property database using Microsoft Access. a. Open the Microft Access software program b. After the Microsoft Access Window opens, select Blank Access Database, then click okay c. The file New Database window opens, then type the word Client as the name for this file where the cur

Write SQL SELECT, UPDATE, and DELETE statements

Write SQL SELECT, UPDATE, and DELETE statements. Using the database and tables from Week Three, write queries using the SQL SELECT statement. Note: Select all of the data from both of your tables before you perform the following. Choose an EEO_1_classification: Increase all employees' salaries that have: the selected EEO_1_cl

Create a decision table, flowchart and find test values

A telephone company service plan charges 25 cents for each call made. In addition, it charges 5 cents a minute for all calls made to a phone number that has a service plan with the company. Or, if the call is to a phone that does not have a service plan with the company, it charges 15 cents a minute for calls that last less th

Expanding XML, DTD, CSS file

Expand the XML file a little bit by making sure that it is valid as well as well-formed. "Create a DTD file that defines the format of the XML file. Also submit an updated version of the XML file that is linked to the DTD file. To clarify : ? You will need to turn in three files for this project: o Your DTD file. (