Character Sets
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How many bits does ASCII use? How many characters can it represent?
ASCII uses 7 bits to represent characters (hence max 128 characters) However, 8 bits are used to store each character (preceding 0) The leading 0 is sometimes used as parity bit instead
How does ASCII work?
Each of the characters is assigned a numeric character code Which is represented and stored in the computer as binary
What is the downside of ASCII?
ASCII is not sufficient to represent all of the languages and scripts used around the world
Why is unicode needed?
ASCII can’t represent all languages and scripts ASCII can’t represent all possible symbols The World Wide Web made it important to have a universal international coding system
Which is the most common unicode encoding standard used?
UTF-8
What are the first 128 codes in unicode the same as?
The first 128 codes in ASCII