Explain how a computer would represent a positive integer
Integers are whole numbers (e.g. 5, 87, 200).
Computers can only work with binary values (1s and 0s).
Integers can be represented by a binary numbers.
Describe floating point representation in terms of the mantissa and exponent
To store a real number the computer moves the decimal point to the left hand side.
The number is then stored in 2 parts, the mantissa and the exponent.
Describe how extended ASCII (8-bit) is used to represent characters
ASCII uses 7 bits and can represent 128 different characters.
Extended ASCII uses 8 bits and can represent 256 characters.
Describe the vector graphics method of graphic representation
Vector graphics represent images using shape objects.
Each object has attributes which describe how it is to be drawn.
Shape objects include:
rectangle
ellipse
line
polygon (e.g. pentagon, hexagon)
The attributes which describe the shape object include:
co-ordinates
fill colour
line colour
