Data Representation Flashcards
How much Bits is ASCII
8 bits
How much Bits is Unicode
16 bits
How much Characters does ASCII have
128
How much characters does Unicode have
65,536
Advantage of Unicode
Has more characters so there are emojis and different characters from different languages.
Disadvantage of Unicode
Each character uses more memory/storage when stored.
Advantage of ASCII
Uses less memory/storage than Unicode.
Disadvantage of ASCII
Limited amount of characters which makes it limited to other languages
What are the two types of Graphics
Vector
Bit-Mapped
What are the Vector attributes
Fill Colour, Line Colour, Coordinates
What are the Vector Objects
Rectangle, Ellipse, Polygon, Line
What are Bit-mapped Graphics made of
Pixels
What is Resolution
The number of pixels used to represent the image which are stored in a 2D array.
What is Bit Depth
The number of bits allocated to represent each pixel.
What happens when you increase the Resolution or Bit Depth
More Storage is Used/File size increases
What is dpi
Dots Per Inch
Advantages of Vectors
Objects can be layered
Increasing the scale of an object doesn’t affect file size
File Size is smaller than Bit-Mapped
Disadvantages of Vectors
Limitation of creativity with the image
Less Detailed
Advantages of Bit-Map Graphics
Higher Quality Images
More Detail
Looks Better
Disadvantages of Bit-Map Graphics
Takes up more Storage than Vectors
Increasing Resolution increases Storage required
What happens when you increase the number of Bits assigned to the Mantissa
Increases the precision of the number
What happens when you increase the number of Bits assigned to the Exponent
Increases the range of numbers.
