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digital data representing data - Coggle Diagram
digital data representing data
how data is stored
bit
the smallest unit of storage is a bit. a bit (short for binary digit) is either a 1 or0
nibble
a group of 4 bits
byte
8 bits is called a byte. each character is made of 1 byte. eg leters
kilobyte
1024 bytes. kilobyte is often abbreviated to kb.
megabyte
1024 kilobytes. often abbreviated to mb
gigabyte
1024 megabytes. often abbreviated to gb
terabyte
1024 gigabytes. often abbreviated to tb
datatypes
numeric
integer- whole number either positive or negative
real number- a number that contains a decimal point. it can also be positive or negative
date/time- allows a date or time to be stored. a date and time can be in many different formats
character- a letter, number or symbol
string- 'text, or 'alphanumric'. a
difference between information and data
data is raw facts and figures
information is data with meaning(CONTEXT)
DATA+MEANING=INFORMATION