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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An image of 500×500 pixels uses 1 bit per pixel (monochrome). What is the uncompressed size in bytes?

What effect does adding an alpha channel to a 24-bit image have on bits per pixel?

Which image format uses lossless compression and supports transparency?

What is a pixel in a digital image?

What does 24-bit colour mean?

How do you calculate the total number of pixels in an image?

What is the purpose of a colour palette in indexed images?

Which of the following best describes image resolution?

Which of the following is true about RAW image files from digital cameras?

Which colour model is most commonly used for storing digital photographs on screens?

Why is JPEG not ideal for storing images that will be edited multiple times?

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