1.2.1 Character Sets

Fill the gap: A ________ ________ (9,3) defines the full collection of letters, numbers, symbols, and control codes a computer can understand.

Why do computers use character sets?

• To store images

• To assign binary codes to characters

• To calculate file size

• To compress text

Fill the gap: Each character in a character set is assigned a unique ________ (6 letters).

What happens if two systems use different character sets?

• Text displays correctly

• Text may appear as strange symbols or “garbage”

• The file size becomes smaller

• The system crashes

Fill the gap: In ASCII, the binary number 01000001 represents the letter ________ (1 letter).

How many characters can 7-bit ASCII represent?

• 64

• 128

• 256

• 512

Fill the gap: ASCII includes ________ (2 digits) control codes used for non-printing instructions.

Which of these is an ASCII control code?

• ASCII 10 = New line

• ASCII 65 = A

• ASCII 255 = é

• ASCII 1000 = Ω

Fill the gap: Extended ASCII uses ________ (1 digit) bits, allowing 256 characters.

Why was Extended ASCII developed?

• To represent images

• To add accented letters and more symbols

• To replace Unicode

• To make ASCII backwards compatible