Computer Science · May / June 2025 · Paper 12 · Question 2
0478
As printed in the paper
The question as text
A student has an image file stored on their computer.
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2(a)[1]
A
2(b)(i)[1]
3
2(b)(ii)[1]
2
2(c)(i)[1]
32 bits are used to represent each/a/one colour in the image // 232 (approx. 4.3 billion) different colours can be used/are available for the image
2(c)(ii)[2]
Any two from:
The size of the image file increases.… as the number of bits used to represent/store a colour has increased2(d)[3]
Any three from:
The size of the file is reduced without permanently removing any data.A compression algorithm is used.… such as Run length encoding/RLE.Repeating pixels are grouped/identified … // Patterns are identified …… and stored with the number of times they are repeated.… and indexed
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