1.2 - Characters

Define what is meant by the term 'character set'?

• All the characters recognised/can be represented by a computer.  Each character has a number.

• A set of characters in Disney

ASCII stands for what?

• Armenia Standard Code Information Interchange
• Angola Standard Code Information Interchange
• American Standard Code Information Interchange
• American Super Code Information Interchange

Before ASCII in 1963 what code was used previously to represent characters?

• Extended ASCII

• Teleprinter machines

• Unicode

• ASCII

How many bits (0s and 1s) are used in ASCII?

• 7

• 8

• 9

• 16

How many bits are used in extended ASCII?

• 7
• 8
• 9
• 16

How many bits are used in Unicode?

• 7
• 8
• 9
• 16

How many characters can be encoded using 7 bit ASCII?

• 128

• 256

• 512

• 65536

How many characters can be encoded using 8 bit extended ASCII?

• 128
• 256
• 512
• 65536

How many characters can be encoded using 16 bit Unicode?

• 128
• 256
• 512
• 65536

Not all characters on a keyboard are printable.  What are the others called?

• Control characters or control codes

• Function keys