Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
Denary
|
A system of numbers using ten digits 0 and 1-9 (also called base-10)
|
|
Bit
|
Binary digit 1 or 0
|
|
Byte
|
8 bits
|
|
Nibble
|
4 bits or half a byte
|
|
Kilobyte
|
1024 bytes
|
|
Megabyte
|
1024 kilobytes
|
|
Gigabyte
|
1024 megabytes
|
|
Terabyte
|
1024 gigabytes
|
|
Overflow
|
When a number becomes too large to fit into the number of bits allocated it is said to 'overflow' and some bits are 'lost' leaving an incorrect value or error
|
|
Hexadecimal
|
A number system using sixteen digits 0, 1-9 and A-F (also called base-16)
|
|
Character set
|
The characters available to a computer
|
|
ASCII
|
7-bit system used to code the character set (keyboard inputs) of a computer
|
|
Unicode
|
Up to 32-bit system to code the characters of a computer
|
|
Pixel
|
Smallest addressable element of an image. Pixels are the dots that make the image on screen
|
|
Colour depth
|
The number of bits used for each pixel or dot. The more bits the more colours that can be represented
|
|
Resolution
|
The number of pixels or dots per unit for example ppi (pixels per inch), often referred to as dpi (dots per inch)
|
|
Metadata
|
Information about the image data that allows the computer to recreate the image from the binary data in the file. This must contain the height and width in pixels and the colour depth in bpp (bits per pixel)
|
|
Analogue
|
Refers to continuously changing values (think sound wave)
|
|
Sample rate
|
The number of times the sound is sampled per second measured in Hz (100 Hz is 100 samples per second)
|
|
Bit rate
|
The bit rate is the space available for each sample measured in kilobits per second (kbits/second)
|
|
Address
|
A location in main memory used to store data or instructions
|
|
Register
|
Special fast access part of the CPU that stores data in use by the CPU
|
|
Program counter
|
A register in the CPU that keeps the address of the next instruction
|
|
Operator
|
This is the part of the instruction that tells the CPU what to do
|
|
Operand
|
This is the part of the instruction that tells the CPU what to apply the operation to
|
|
Accumulator
|
A register in the CPU that stores data currently being used by the CPU
|