3.5.5.2 ASCII and Unicode. Flashcards

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1
Q

What does ASCII stand for?

A

American Standard Code for Information Interchange.

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2
Q

What are Unicode and ASCII examples of?

A

Information coding systems (ICS).

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3
Q

How many bits does ASCII make use of and what does this mean?

A

ASCII makes use of 7 bits to represent 128 (=2^7) different characters including A to Z, 0 to 0 and various symbols.

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4
Q

Why was UNICODE introduced?

A

To represent a wide variety of alphabets by computers. This was necessary as the internet became more widely used throughout the world and there was a requirement for an ICS that could represent not just the Latin alphabet but also Arabic, Cyrillic, Greek and Hebrew.

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5
Q

How many bits does the standard Unicode use?

A

From anywhere between 8 to 48 bits (1 to 6 bytes) per character. This allows Unicode to represent a much wider range of different characters than ASCII.

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6
Q

Why can Unicode represent more characters than ASCII?

A

Unicode uses more bits per character than ASCII, allowing for a larger range of characters to be represented.

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