1.2 Text

• Character set


  A collection of characters and the corresponding binary codes that represent them

  
  

  • All the characters and symbols that can be represented by a computer system; [1 mark]
  • Each character and symbol is assigned a unique value; [1 mark] 
• ASCII


  Assigns a unique 7-bit binary code to each character, including uppercase and lowercase letters, digits, punctuation marks, and control characters
• ASCII has limitations in terms of the number of characters it can represent, and it does not support characters from languages other than English
• Unicode


  A character encoding standard that allows for a greater range of characters and symbols than ASCII, including different languages and emojis
• Unicode encoding scheme


  Variable-length, assigns a unique code to each character, which can be represented in binary form using multiple bytes
• As Unicode requires more bits per character than ASCII, it can result in larger file sizes and slower processing times when working with text-based data
• why does the unicode character set take up more storage space than ASCII

   Each character is encoded using more bits; [1 mark]