Representing Data: Quiz 2

Put these in order smallest first.

• Petabyte Megabyte Kilobyte

• Megabyte Terabyte kilobyte

• Kilobyte Terabyte Petabyte

What is the term for the number of pixels high and wide in a bitmap image?

• denary

• pixel image

• resolution

• binary

What is a bitmap?

• an image of a map

• an image made up of pixels represented by colours

• an image made up of pixels represented in binary

What do we call a sound wave that you hear?

• microwave

• analogue sound

• digital sound

• sound wave

What do we call a sound that has been converted from analogue sound into binary?

• amplitude

• microwave

• digital sound

What is amplitude?

• height of the analogue sound wave

• the length of the analogue sound wave

What is the ASCII code?

• a number system

• an alphabet

• it represents 128 of the characters (7 bits for each character)

How many characters in the extended ASCII code?

• 300

• 257

• 124

• 1010

How many characters in the Unicode?

• 65,000

• 100,000

• 1000

How many bytes in a kilobyte?