Image Representation Quiz

What is a bitmap image?

• A list of colours

• A type of spreadsheet

• An image made of coloured pixels

• A text file

What does each pixel in a bitmap image store?

• A sound

• A colour

• A number

• A word

How many colours can be represented with 3-bit colour?

• 4

• 8

• 16

• 256

What is the formula for calculating image file size (in bits)?

• Width + Height + Bit Depth

• Width × Height × Bit Depth

• Width ÷ Height × Bit Depth

• Width + Bit Depth

What is the bit depth if an image can display 16 colours?

• 2

• 3

• 4

• 8

An image is 200 pixels wide and 100 pixels high. Each pixel uses 8 bits. What is the file size in bytes?

• 160,000 bytes

• 20,000 bytes

• 25,000 bytes

• 10,000 bytes

How many bits are in 1 byte?

• 2

• 4

• 6

• 8

What does a higher bit depth mean?

• Fewer colours

• More colours

• More pixels

• Less memory used