Character Encoding Systems and Error Detection

Question 1

Majority Voting

Answer 1

Triple the data and then use the majority bit e.g. 101 becomes 111000111 which can then be interpreted at 101 even if a bit gets corrupted

Question 2

Even/ Odd parity

Answer 2

The 8th bit off the data is 1 is used to make the total number of 1s even/ odd respectively

Question 3

Check Digit

Answer 3

Find the digital root of a number and add it to the end. Either add up all the digits in a number or divide by 9 and the remainder is the answer (unless its 0 then its 9)

Question 4

ASCII

Answer 4

Can store 128 different characters, only supports English, uses 7 bits

Question 5

Unicode

Answer 5

Can store loads of characters, supports every language and emojis, various types of Unicode use different amounts of bits, the first 128 characters are the same as ASCII