INFO1010 Study Guide - Ann Arbor, Michigan, Referential Integrity, Categorical Variable

• 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. A bit, which is a binary digit, has only 2 possible states (0 and 1) A binary number is made up of a collection of bits. Bits are bundled into bytes - a group of 8 bits. A byte can be used to record a text character (e. g. 0100 0001 is a) Graphics and sounds are stored as a collection of bits. 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. 2 | p a g e: random access memory (ram) provides very short-term storage for data that is currently needed for processing the cpu.