ASCII and Unicode

• what is character code

  A unique representation of a character
• What is ASCII


  A standard binary coding system for characters and numbers
• How many bits does ASCII have

  8-bits, which allow 256 characters to be represented
• what are the limitations of ASCII (2)

  • 256 characters aren't enough to represent all the world-wide characters
  • initially developed in eng, so didnt represent all other languages
• What is unicode 


  A standard binary coding system that has superseded ASCII

  • includes international characters
• What are the two main versions of unicode

  • UTF-8 (8 bits)
  • UTF-16 (16 bits)
• What is a parity bit

  A method of detecting errors during data transmission by counting the number of 1s in the binary data