CS 110 Lecture Notes - Lecture 3: Competitive Advantage, Disk Storage, Memory Card
Document Summary
A way of representing 4 bits with 1 character. A file is a block of arbitrary information. Based on the concept of a paper document. Keep the results of countless computations on file . Modern files are made up a stream of bytes. Number of bits necessary to represent one character. Originally, a record was one line of characters. Each record may or may not be different. Each pixel is assigned a 0 (black) or 1 (white) Rgb- each pixel is assigned a value for each of red, green, and blue. Usually the owner is the person who created the file. A directory is a special type of a file. Standard file system of windows nt and beyond. W2000, xp, server 2003, server 2008, vista, windows 7. If data only exists in one spot, it can be lost. Spend large sums of money to try and retrieve. Disk drives are cheap, quick to back up to another.
