Key terminology 2.6 Flashcards
Denery
A numerical notation system using base 10: 0-9
Binary
A digital notation system using base 2: 0 or 1
Hexadecimal
A numerical notation system using base 16: 0-9 and A-F
Binary Addition Overflow
A number that is too large to be stored in the intended location because of extra digits created through binary addition
Binary shift
Allows easy multiplication or division of binary numbers by multiples of 2
Check digit
A calculation on the data to create an extra number for error checking. When the data is inputted the check digit is recalculated to ensure it matches, and the data has been entered correctly, which is an example of data validation
Character set
The set of symbols/characters that may be represented by a computer at a particular time
ASCII
American Standard Code for Information Interchange: a character set created for computer systems using 7 bits
Unicode
The standard character set that includes characters from almost all the world’s languages using 16 bits
Pixel
The smallest unit of a digital image or graphic that can be displayed, represented by a dot or square on the screen
Metadata
Data that describes, and gives information about, other data
Colour depth / Bit depth
The number of bits used to represent a pixel and its’ colour
Resolution
The number of pixels displayed on a screen, defined as: number of pixels along the width x number of pixels along the height
Bit rate
The number of bits per second that can be transmitted along a digital network
Sampling frequency
The number of samples stored per second, calculated by the sample rate x bit depth
