Data Representation - Storing Images (GCSE Computing)

The following is a GCSE Computing test covering 'Data Representation - Storing Images'

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Question 1

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If you double both the width and height of an image, what happens to the total number of pixels?

What is a pixel in a digital image?

Which of the following best describes image resolution?

If an image uses indexed colour with a palette of 256 colours, how many bits per pixel are required?

What is the main difference between bitmap (raster) and vector images?

An image is 800 pixels wide and 600 pixels high. How many pixels does it contain?

Which of the following is a reason to reduce image resolution before uploading to a website?

Why might someone use lossless compression for an image?

An image with dimensions 1600×1200 uses 32 bits per pixel. What is the uncompressed file size in megabytes (MB)?

What does the term "colour depth" refer to?

What does 24-bit colour mean?

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