Number systems, ASCII and Unicode Topic 2

What is a bit?

What is a bit?

Each individual digit in a binary value

What are bytes

bits grouped together into units

How many bits in one byte?

8 bits

Why was the International Electrotechnical Commission (IEC) established?

Bytes go up in twos and it uses different prefixes to represent multiples of base 2

What is the multiple of mebibytes?

2^20

What is the multiple of gibibytes?

2^30

What is the multiple of tebibytes?

2^40

What is ASCII?

established to encode symbols found in the English alphabet

What is the ASCII character set ?

a 7 bit character set giving 2⁷ (128) possible binary codes

What is Unicode?

standardise the encoding of characters from all languages

What is the character set of unicode?

either 16 bits or 32 bits

What is the advantage of unicode?

every character in every language in the world, every mathematical and scientific symbol, can be represented

What is the disadvantage of unicode?

It can causes for an excessive amount of unused storage for each character

How was the introduction of unicode improved

•first 128 Unicode characters were set to be the same as the ASCII character set