Computer systems/section 1.5

Base 10, uses digits 0 - 9

Base 2, uses digits 0 and 1

8 digits, where 255 is the maximum denary value an 0 is the minimum

The significant figures of the actual digits of the number e.g. in 0.2345 x 1o^5, 2345 is the mantissa

In 10^n, n is the exponent; tells you how many places to move the decimal point in the mantissa e.g. in 0.2345 x 10^5, 5 is the exponent

A 2D array of pixels

The total number of pixels in an image

Defines the number of colours available e.g. 8-bit is a bit depth, means there are 2^8, or 256, colours

better quality but greater file size

lower file size but poorer quality

Each pixel is stored as a binary value

A list of attributes that are used by the computer to create images

does not affect resolution, so quality is unaffected

without affecting what is underneath

smaller unless there are lots of complex shapes

SVG Scalable Vector Graphic

Rectangle, ellipse, line, polygon

Co-ordinates, fill colour, line colour

Central processing unit, handles all instructions that make hardware and software run normally

Responsible for arithmetic (add, subtract etc.) and logical operations (AND, OR etc.) Calculating brain of the CPU, processes the data Arithmetic logic unit

ALU/Arithmetic Logic Unit

Controls the operations of the processor, decodes the program instructions, manages other parts of the CPU to carry out instructions Control Unit

Storage locations for data being processed by the CPU, and instructions that are being executed

Registers