CAMBRIDGE IGSCE COMPUTER SCIENCE SECOND EDITION VOCAB FLASHCARDS Unit 1

Hexadecimal

A base-16 number system that uses the values 0-9 and characters A-F.

Binary

A base-2 number system that uses the values 0 and 1.

Analogue data

A continuous stream of data that is processed by humans.

Logic gate

A very small component in a computer system that controls the flow of electricity.

Digital Data

Discrete data that only uses the values 0 and 1.

Register

A small component in a computer system that is to temporarily store data.

Denary

A base-10 number system that uses the values 0-9.

MAC Adress

A unique address that is given to the computer at the manufacturing stage that can be used to identify the computer.

Overflow Error

A type of error that occurs when a number larger than a register can store is generated.

Character Set

It contains all the characters that are in that character set and the binary value that is assigned to each character.

Pixel

A very small dot of colour that is displayed with many others to create an image.

Resolution

The dimensions of an image.

Metadata

Additional data that is stored with an image that can provide information such as the dimensions of the image and the time and date the image was taken.

Color Depth

The number of bits that are used to create each colour in an image.

Sound Sampling

A little piece of sound that is recorded at regular time intervals.

Sample Rate

The number of samples recorded each second.

Sample Resolution

The number of bits that are used to record each sound sample.

Compression

A method that uses an algorithm to reduce the size of a file.

Lossy

A compression method that reduces the size of a file by permanently removing data.

Lossless

A compression method that reduces the size of a file by temporarily altering the data.

Perceptual Music Shaping

A process that is used in lossy compression that removes sounds that are not normally heard by the human ear.

RLE (Run Length Encoding)

An algorithm that groups together repeating patterns and indexes them.