2210_s26_ms_11 2026 May-June Computer Science 2210 Mark Scheme 1 Variant 1 · Cambridge CAIE O Level

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2210_s26_ms_112026 May-June Computer Science 2210 Mark Scheme 1 Variant 1

This is the official Cambridge mark scheme for Computer Science (2210) Mark Scheme 1 (Variant 1) from the 2026 May-June session. Mark schemes show exactly how each mark is awarded, including acceptable alternative answers, required key terms, and common errors that lose marks. Cambridge mark schemes use notation like "allow," "accept," and "do not credit" to define the boundary between full marks and zero.

Also referenced as: 2210_s26_ms_11 · 2210/11/m/j/26 ms · 2210/11 May/June 2026 ms

Paper 1: Computer Systems This is Paper 1: Computer Systems, worth 75 marks with a duration of 1h 45m. Short-answer and structured questions covering data representation, communication and internet technologies, hardware and software, security, and ethical/legal/environmental impacts. Use technical terminology throughout.

This mark scheme corresponds to 2210_s26_qp_11. For maximum revision benefit, attempt the question paper under strict exam conditions first, then use this mark scheme to self-assess. Pay attention to the marking notation: "allow" means an alternative is accepted, "do not credit" means a specific phrasing is rejected even if technically correct, and "ORA" (or reverse argument) means the mark can also be earned with the opposite reasoning.

Cambridge mark schemes reward precise language. For Computer Science (2210), look for keywords the examiner requires — definitions must include specific terms (e.g., "per unit mass," "resultant"), and calculations must show working even if the final answer is correct. Understanding mark scheme conventions helps you write answers that hit every marking point, not just the general idea.

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Same paper, other years

Computer Science (2210) Mark Scheme 1 (Variant 1) from other exam sessions — practise the same paper across the years, then check each one against its mark scheme.

Examiner Insights — Paper 1: Computer Systems

Based on analysis of 2 official Cambridge documents (2023)

1

Generic descriptions of sensor-based systems instead of applying to the given context

Very few candidates were able to provide a detailed, technical and accurate response for this question. Many candidates gave a generic description of a system that uses sensors and microprocessors.2210 Paper 1, May/June 2023

How to fix: When a question gives a scenario (e.g. a water tank system), name the specific sensor for that context (e.g. level sensor), describe what it measures, how the microprocessor compares the reading to a stored value, and what output device acts on the decision. Never write a generic 'sensor sends data to microprocessor' answer — always tie every step to the scenario.

3

Unable to describe sound representation — confusing sample rate/resolution with image concepts

Few candidates were able to state what is meant by the sample rate and resolution. Some candidates tried to describe the sample resolution in relation to an image.2210 Paper 1, May/June 2023

How to fix: Sample rate = the number of samples taken per second (measured in Hz). Sample resolution (bit depth) = the number of bits used to store each sample. Higher sample rate captures more detail in the sound wave; higher resolution means each sample is more precise. Do not confuse with image resolution (pixels) — these are sound-specific concepts.

4

Describing benefits of compilers instead of how they operate

Few candidates were able to accurately and technically describe the operation of a compiler. The most common mark point awarded was for stating an executable file is created. Some candidates described the benefits of a compiler, rather than the operation.2210 Paper 1, May/June 2023

How to fix: When asked how a compiler works: (1) it translates the entire source code into machine code/object code in one go, (2) it checks the whole program for errors before execution, (3) it reports all errors found after compilation, (4) it produces an executable file that can run without the compiler. If the question says 'describe the operation', focus on the translation process — not advantages like 'runs faster'.

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All Computer Science (2210) Papers — 2026 May-June

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Computer Science Exam Guide: How to Score Higher

Top mistakes, scoring patterns & answer frameworks from 2 official Cambridge documents