INFO1010 Study Guide - Final Guide: Location Test, Referential Integrity, Squared Deviations From The Mean

• School: University of Newcastle
• Department: Information Systems
• Course: INFO1010
• Professor: All

Document Summary

Computers: def. a programmable machine that responds to a set of instructions in a well-defined manner. Computer system: both hardware and software are required for a computer to work. Made up of cpu; main memory; disk; keyboard; mouse; monitor; printer; network. Central system: a computer"s central processing unit (cpu) does all of the calculations. It operates very fast: the main memory is an area where data is stored, random access memory (ram) provides very short-term storage for data that is currently needed for processing the cpu. It is volatile and the contents can change frequently, and are lost when the power is turned off. Secondary storage: secondary storage is slower than main memory, but is cheaper and non-volatile. Magnetic: floppy disk outdated, hard disk made up of a hard disc, that has 8 tracks that divide the disc, and many sectors that divide the tracks, raid arrays redundant araay of independent drives.