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Text, sound and images past paper questions

O Level Computer Science 2210 · Data representation. 1 Understand how and why a computer represents text and the use of character sets, including American standard code for information interchange (ASCII) and Unicode 2 Understand how and why a computer represents sound, including the effects of the sample rate and sample resolution Text is converted to binary to be processed by a computer Unicode allows for a greater range of characters and symbols than ASCII, including different languages and emojis Unicode requires more bits per character than ASCII A sound wave is sampled for sound to be converted to binary, which is processed by a computer The sample rate is the number of samples taken in a second The sample resolution is the number of bits per sample The accuracy of the recording and the file size increases as the sample rate and resolution increase 3 Understand how and why a computer represents an image, including the effects of the

In Cambridge O Level Computer Science 2210, Text, sound and images came up in 9 of the 34 papers on Paperstreak, for about 3 marks a paper when it does. It last came up in October/November 2025.

Often set with Data storage and compression, Types and methods of data transmission.

9 questions, newest first

1. 2210/13/O/N/25 Question 5 part (a) · 5 marks
2. 2210/11/M/J/25 Question 3 · 4 marks
3. 2210/12/M/J/25 Question 2 parts (c(i)) (c(ii)) · 3 marks
4. 2210/13/O/N/24 Question 2 parts (d(i)) (d(ii)) (d(iii)) · 4 marks
5. 2210/12/O/N/23 Question 5 parts (a) (b) (c) · 4 marks
6. 2210/13/O/N/23 Question 7 parts (a) (b) (c) · 3 marks
7. 2210/11/M/J/23 Question 2 part (a) · 2 marks
8. 2210/12/M/J/23 Question 3 part (a) · 3 marks
9. 2210/11/M/J/22 Question 1 part (a(i)) · 1 mark

More in Data representation: Number systems, Data storage and compression.

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