Image Representation — GCSE Computer Science
7 medium multiple-choice questions based on the BBC Bitesize video 'Image Representation' by Too Tall Productions. Questions mix recall and applied reasoning tied to the video sections.
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Quiz Questions & Answers
Review every prompt, the correct responses, and helpful context to prep for your own run-through.
Question 1: What is a 'pixel' as explained in the video?
A metadata tag storing location data
A file format for remembering images
A camera lens setting for resolution
A tiny coloured block that makes up an image
Question 2: How does the video define 'color depth' in practical terms?
The number of bits used per pixel determining how many colours can be represented
How bright the colours appear on a monitor
The number of images stored in a file
The physical size of each pixel on the screen
Question 3: If an image uses a 2-bit colour depth, how many colour variations can it display?
Sixteen
Eight
Four
Two
Question 4: Which of these best describes 'resolution' as the video presents it?
Pixel density measured often as dots per inch (DPI), affecting detail and file size
The filename and format of an image
The number of colours available in an image
The camera lens aperture used to take a photo
Question 5: What role does metadata play according to the video?
It removes pixels to compress the image
It stores information about the image like colour depth, resolution, dimensions and timestamps
It converts binary into human language captions
It displays the pixel colours on the screen
Question 6: Why might a 24-bit image have a much larger file size than a 1-bit image?
Because 1-bit images include extra metadata that reduces file size
Because 24-bit images always use higher DPI than 1-bit images
Because each pixel stores 24 bits of colour information instead of 1 bit, greatly increasing data per pixel
Because 24-bit images store pixel positions instead of colours
Question 7: If a web image is 1 inch square at 72 DPI, roughly how many pixels does it contain as stated in the video?
Just over five thousand pixels
About 72 pixels
Exactly five hundred pixels
Around sixteen million pixels