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Compression past paper questions

Computer Science 9618 · Information representation. Reasons for compression; lossy and lossless methods for text, bitmap, vector and sound; run-length encoding.

It came up in 36 of 104 papers, for about 4 marks a paper when it does. It last came up in October/November 2025.

Often set with Multimedia, Data Representation, Operating Systems, Language Translators.

36 questions, newest first

1. 9618/11/O/N/25 Question 7 part (d(iii)) · 2 marks
2. 9618/12/O/N/25 Question 6 part (a) · 1 mark
3. 9618/11/M/J/25 Question 2 parts (b(i)) (b(ii)) · 7 marks
4. 9618/11/O/N/24 Question 4 parts (b(i)) (b(ii)) · 6 marks
5. 9618/12/O/N/24 Question 7 part (a(iii)) · 1 mark
6. 9618/13/O/N/24 Question 6 parts (b(iii)) (c(ii)) · 4 marks
7. 9618/12/M/J/24 Question 2 part (d(iii)) · 2 marks
8. 9618/13/M/J/24 Question 2 parts (b(i)) (b(ii)) · 5 marks
9. 9618/11/O/N/23 Question 1 part (c) · 2 marks
10. 9618/12/O/N/23 Question 6 part (a) · 3 marks
11. 9618/13/O/N/23 Question 5 part (b(i)) · 2 marks
12. 9618/11/M/J/23 Question 1 parts (c(i)) (c(ii)) · 6 marks
13. 9618/11/O/N/22 Question 7 part (c) · 3 marks
14. 9618/12/O/N/22 Question 8 parts (c(i)) (c(ii)) · 4 marks
15. 9618/12/M/J/22 Question 1 part (d) · 2 marks
16. 9618/13/M/J/22 Question 1 parts (a(iii)) (a(iv)) · 4 marks
17. 9608/11/O/N/21 Question 7 part (b) · 4 marks
18. 9618/11/O/N/21 Question 7 parts (b(i)) (b(ii)) · 4 marks
19. 9618/12/O/N/21 Question 5 part (b(ii)) · 4 marks
20. 9618/13/O/N/21 Question 7 parts (b(i)) (b(ii)) · 4 marks
21. 9608/11/M/J/21 Question 8 parts (b(i)) (b(ii)) · 4 marks
22. 9608/12/M/J/21 Question 7 part (c) · 3 marks
23. 9618/11/M/J/21 Question 1 part (b) · 3 marks
24. 9618/13/M/J/21 Question 1 part (b) · 3 marks
25. 9608/11/M/J/20 Question 9 part (b) · 1 mark
26. 9608/12/M/J/20 Question 2 parts (b(i)) (b(ii)) · 3 marks
27. 9608/13/M/J/20 Question 5 part (b) · 3 marks
28. 9608/11/O/N/19 Question 5 parts (e(i)) (e(ii)) (e(iii)) · 6 marks
29. 9608/11/M/J/19 Question 1 parts (d(i)) (d(ii)) (d(iii)) · 5 marks
30. 9608/12/O/N/18 Question 1 part (b(ii)) · 5 marks
31. 9608/13/O/N/18 Question 1 parts (b(ii)) (c) · 7 marks
32. 9608/11/M/J/18 Question 2 part (b(ii)) · 2 marks
33. 9608/13/M/J/18 Question 6 part (b) · 3 marks
34. 9608/12/O/N/16 Question 2 part (c(ii)) · 1 mark
35. 9608/11/M/J/16 Question 4 parts (b(i)) (b(ii)) (b(iii)) · 8 marks
36. 9608/12/M/J/16 Question 4 parts (b(i)) (b(ii)) (b(iii)) · 8 marks

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