Year 9 Data Representation

The smallest unit of a digital image or display. It is a tiny dot or square, that, when combine with millions of others, creates a complete image.

• Pixel

• Colour depth

• Bit

• RGB

The number of pixels in an image or on a display screen.

• Resolution

• Pixel

• Colour depth

The number of bits used to represent the colour of a single pixel in a digital image.

• Colour depth

• Pixel

• Resolution

• Binary

Which of the following best describes how images are represented in binary?

• Using a sequence of binary digits for each pixel

• Using text characters for each pixel

• Using mathematical equations to draw shapes

If an image has 2-bit colour depth, how many possible colours can each pixel represent?

• 4

• 2

• 8

• 1

If an image has a 1-bit colour depth, how many possible colours can each pixel represent?

• 2

• 3

• 4

• 5

What is the main advantage of increasing the colour depth of an image?

• The file size decreases

• The resolution improves

• The image can display more colours

• The image uses less binary data

How is the size of an image file affected by increasing the resolution?

• The file size increases

• The file size decreases

• The file size remains the same

• The file size doubles

The binary value 11111111 is equivalent to _______ in decimal.

• 255

• 200

• 0

• 10

If an image is 100 pixels wide and 50 pixels tall, what is the total number of pixels in the image?

• 150

• 500

• 5,000

• 50,000