AQA GCSE Computer Science - 3.3.6 Representing images

Which of these is not an image file extension?

• MP3
• GIF
• TIF
• BMP

How does an increase in the number of colours affect the file size relative to the overall file size?

• Larger increase
• Stays the same
• Small decrease
• Big decrease

Images can be represented using 1s and 0s?

• true
• Sometime
• Half the time
• Never

Each pixel in an image has 16 colours. What is the colour depth?

• 4 bits
• 2 bits
• 3 bits
• 5 bits

How many total colours can be used in an image with a colour depth of 6 bits?

• 64
• 32
• 16
• 128

An image has a height of 200 pixels, width of 400 pixels and a colour depth of 3 bits. What is the file size in bytes?

• 30000
• 240000
• 120000
• 48000

The file size of an image is 90kiloB. The height and width are 300 and 400 pixels. What is the colour depth used in the image?

• 6bits
• 7bits
• 8bits
• 5bits

Calculate the size in kilobytes of an image captured in 16 colours with a size of 1,000 pixels by 1,000 pixels?

• 500
• 250
• 1000
• 50

Another term for Bitmap graphic is?

• Rastor Graphic
• Vector Graphic
• 3D Graphic
• Text

How many colour channels are there in a 24bit image?

• 3
• 2
• 4
• 1