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

Which formula gives the uncompressed file size (in bytes) of a bitmap image?

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

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

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

What is a pixel in a digital image?

What does 24-bit colour mean?

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?

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

What is lossy compression for images?

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