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OCR · GCSE · Computer Science

Data Representation
Practice Questions

40 OCR GCSE Computer Science questions on Data Representation, each with instant feedback and a full examiner-style mark scheme.

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✨ Revision guide includes key terms, worked examples and exam technique for Data Representation.

Try 2 sample questions on Data Representation

Question 1 · 1 mark · Difficulty 1/3

How many different values can be represented with 4 bits?

  1. 8
  2. 4
  3. 15
  4. 16
Show answer & explanation
✓ Answer: D — 16
Award 1 mark. Each extra bit doubles the number of patterns, so 4 bits give 2⁴ = 16 different values, from 0000 (0) to 1111 (15).
Question 2 · 1 mark · Difficulty 1/3

What is a pixel?

  1. A unit of sound measured in a recording
  2. The smallest element of a bitmap image
  3. A character in the ASCII character set
  4. A type of compression used for video
Show answer & explanation
✓ Answer: B — The smallest element of a bitmap image
Award 1 mark. Bitmap images are grids of pixels, each storing a colour as a binary code.
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20 questions · 25 min · free

OCR GCSE Computer Science: Data Representation FAQ

Is Kramizo free for OCR GCSE students preparing for Computer Science?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Data Representation practice with other Computer Science topics or even switch to a totally different OCR subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Data Representation questions aligned to the official OCR GCSE Computer Science syllabus?
Every question is written against the published OCR GCSE Computer Science specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real OCR paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from OCR.
How is Data Representation typically tested on OCR GCSE Computer Science papers?
Data Representation appears across multiple question types on real OCR GCSE Computer Science papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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