Digital Data Representing Data Flashcards
Give the definition and examples of data.
Data is raw facts or figures that mean nothing for example 151216, 85748, AABBCCDD.
What is the difference between data and information?
Information is data in context.
Give examples of data turned into information.
Data, Information
151216, 15th December 2016
85748, product number
AABBCCDD, grades in exams.
What are the units of data called?
Bit, nibble, byte, kilobyte, megabyte, gigabyte and terabyte.
What is a bit?
It is the smallest unit of data and is either a 1 or 0.
What is a nibble?
A nibble is 4 bits.
What is a byte?
8 bits or 2 nibbles. A caricature is represented by a byte.
What is a kilobyte?
A kilobyte is 1024 bytes. Abbreviated to KB. Equivalent to 1024 caricatures on screen.
What is a megabyte?
1024 kilobytes. Abbreviated to MB.
What is a gigabyte?
1024 megabytes. Abbreviated to GB.
What is a terabyte?
1024 gigabytes. Abbreviated to TB.
Name the data types.
Numeric, date time, character, string.
What are the 2 types of numeric values you can get?
Integer and real.
What is numeric data type@
A data type that contains numbers.
What is an integer?
It is a whole number eg. 2, 7, 10, -23