Data Representation

Convert 128 to binary

• 10000000
• 01111110
• 10000001
• 11001100

A byte is

• 8 bits
• 4 bits

Convert 64 to binary

• 10000000

• 01111110

• 01000000

• 11001100

Convert 3 to binary

• 10000001

• 01111110

• 00000011

• 11001100

A bitmap image is made up of

• Pixels
• Colours
• Sounds
• Samples
• Characters

Increasing the colour depth means…

• A bigger range of colours can be used for each pixel
• More pixels are in the image.
• More colours are in the image.
• Darker colours

How many colours can be used for each pixel if the colour depth is 4 bit?

• 4 colours
• 5 colours
• 15 colours
• 16 colours

What would be the colour depth of an image which can use up to 256 colours?

• 256 bit
• 8 bit
• 8 byte
• 256 byte

Computers use binary because they have circuits which are either on or off, which gives them two states to work from to make calculations and run processes - True or False?

• True
• False

What is the largest number you can represent with 8 bits?

• 64
• 128
• 200
• 255