Bits And Bytes Stuff

Question 1

ASCII

Answer 1

7 bits to represent 90-100 English characters
Capitals: 010x xxxx
Lowercase: 011x xxxx
X xxxx is number from 1-26

Question 2

Unicode

Answer 2

Attempts to represent all characters from all scripts worldwide
Each character up to 4 bytes
2^32 possible symbols
Currently has 144 697 characters

Question 3

Digital Images

Answer 3

256 shades
Over 16 million colours
3 colour> 3 byte
Transparency> adds 1 byte
Compression algorithms use hexadecimal