Welcome to Your Exam Success Toolkit!

Ever felt like you knew the answer to a Computer Science question but didn't get the marks you expected? Often, the secret isn't just knowing the content—it's knowing how to decode the question. In this chapter, we will explore command terms (the "action verbs" of your exam) and the structured-response technique (the recipe for building high-scoring answers).

By the end of these notes, you will be able to look at any IB Computer Science question and know exactly what the examiner is looking for. Let’s dive in!

1. What are Command Terms?

Command terms are specific words used in exam questions that tell you exactly how to respond. Think of them as the "rules of the game." If the question asks you to "Identify" and you write a three-page essay, you are wasting valuable time. If it asks you to "Evaluate" and you only write one sentence, you will miss out on most of the marks.

The Hierarchy of Command Terms

Command terms are grouped by Assessment Objectives (AOs). As the AO number increases, the complexity of the answer required also increases.

Level 1: Recall (AO1) – Knowing the Facts

These questions ask you to demonstrate basic knowledge.
• Define: Give the precise meaning of a word or concept.
• State: Give a specific name or brief answer without an explanation.
• Outline: Give a brief account or summary of the main points.

Level 2: Application (AO2) – Using What You Know

These questions ask you to apply your knowledge to a specific scenario (like the Case Study).
• Describe: Provide a detailed account, often including "how" or "why" something works.
• Explain: Give a clear account including causes, reasons, or mechanisms. This is a very common term!

Level 3: Evaluation & Synthesis (AO3) – Higher-Order Thinking

These are the "big" questions, often found at the end of Paper 1 or Paper 2.
• Discuss: Give an argument that considers different sides, such as pros and cons or different perspectives.
• Evaluate: Make an appraisal by weighing up the strengths and limitations.
• Justify: Give valid reasons or evidence to support an answer or conclusion.

Quick Review: If you see the word "Discuss", you should immediately think: "I need to show two sides of this story!"

2. The Structured-Response Technique

Don't worry if writing long answers feels tricky. The structured-response technique is a step-by-step way to ensure you hit every mark available.

Step 1: Check the Mark Allocation

The number of marks (e.g., [2 marks] or [4 marks]) is your best guide.
• A 2-mark "Explain" question usually requires one point and one development/example.
• A 4-mark "Describe" question might require two distinct points, each with a bit of detail.

Step 2: Use the "P-E-E" Method for 2+ Mark Questions

For questions asking you to Explain or Describe, use this structure:
1. P (Point): Make your direct claim or identify a feature.
2. E (Evidence/Example): Link it to the scenario (especially if it's about the Case Study).
3. E (Explanation): Explain why this point matters or how it works.

Example Walkthrough:

Question: Explain one benefit of using a wireless network for a small office. [2 marks]

• Point: It allows for increased mobility within the office space.
• Explanation: Employees can move their laptops between desks or meeting rooms without losing their connection to the server.
(This gets 2 marks: 1 for the point, 1 for the clear explanation of why it's a benefit).

Did you know? In the new syllabus, Paper 1 includes three questions specifically related to the Case Study. Using the P-E-E method is the best way to ensure you are "applying" your knowledge to that specific scenario!

3. Command Terms in Theme B (Problem-Solving)

In Theme B: Computational thinking and problem-solving (assessed in Paper 2), you will see specific command terms related to algorithms and code.

• Construct: This usually means you need to write code or an algorithm. In Paper 2, you will choose between Python or Java.
• Trace: Follow an algorithm step-by-step, often using a "trace table" to show how variable values change.
• Determine: Find the only possible answer or outcome (e.g., "Determine the output of the following code").

Common Mistake: When asked to Trace, students often try to do it in their heads. Always write down the values of the variables as they change. It prevents simple errors! For example, if a loop runs \(n\) times, make sure you track the loop counter clearly.

4. Comparing "Discuss", "Evaluate", and "Justify"

These terms often appear in the 6-mark or 8-mark questions. They require AO3 skills, which are the most challenging but also the most rewarding.

• Discuss: Imagine you are a moderator. You need to look at "Factor A" and "Factor B." Mention the benefits of a technology, but also the ethical or environmental drawbacks.
• Evaluate: This is like being a judge. You look at the evidence and decide which option is better and why.
• Justify: This is like being a lawyer. You have made a choice (or the question has made one for you), and you must defend it with strong technical reasons.

Memory Aid: The "Balance Scale"

When you see Evaluate or Discuss, visualize a balance scale. Your answer must have weight on both sides (pros/cons) before you reach a final conclusion.

5. Tips for Success

• Read the whole question: Sometimes the "context" (the story) contains clues about which technical terms to use.
• Watch for "and": If a question says "Identify and explain," you won't get full marks if you only do one part.
• Use technical terminology: Instead of saying "the thing that stores data," say "the database" or "primary storage." Use the terms from Theme A: Concepts of computer science.
• Keep it focused: This chapter is part of the Case Study and exam skills section. For help on reading the actual scenario, see the chapter "Reading and analysing the case study scenario".

Key Takeaways

1. Command Terms tell you the depth required in your answer.
2. AO1 is for facts, AO2 is for application, and AO3 is for critical thinking.
3. Always link the number of marks to the number of points you make.
4. Use the P-E-E (Point, Evidence, Explanation) structure for any question worth more than 1 mark.
5. In Paper 2, Construct and Trace are your most important technical command terms.

Don't worry if this seems tricky at first! With practice, you'll start to see these command terms as helpful signposts rather than confusing hurdles. You've got this!