4.5.5.2 ASCII and Unicode Flashcards Preview

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Flashcards in 4.5.5.2 ASCII and Unicode Deck (6)
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1
Q

What is a character set?

A

All the characters recognised by the computer, each with a unique binary number.

2
Q

How is a character set represented?

A

Each symbol has a unique binary code of 8 bits (1 byte) or more depending on the size of the character set.

3
Q

How many different characters can ASCII represent?

A

128 / 2^7

4
Q

What is Unicode?

A

A coding system that assigns a unique value to the majority of symbols used in the world, including different languages. It continues to increase in size.

5
Q

What are the differences between ASCII and Unicode?

A

ASCII uses fewer bits per character, so Unicode can represent more characters. ASCII uses 7 bits, Unicode uses 16 or 32 bits.

6
Q

Why was unicode introduced?

A

Because ASCII did not represent enough characters, and unicode is a widespread standardised system

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