HKDSE ICT Command Words: How to Answer for Full Marks
The #1 avoidable mark loss in HKDSE ICT isn’t weak knowledge — it’s answering at the wrong depth. You know the concept, but you write a paragraph when the question wanted two bullet points. Or you list facts when the question demanded cause-and-effect reasoning.
This happens every year. Students lose 1-2 marks per structured question simply because they don’t speak the examiner’s language. Over Paper 1 and Paper 2, that’s 8-12 marks gone — easily the difference between a Level 4 and Level 5.
The fix isn’t more practice papers. It’s learning the command-word ladder: what each verb actually wants, how long your answer should be, and how to structure it for maximum marks.
The command-word ladder
DSE structured questions use six main command words. Each maps to a specific depth, answer length, and mark expectation. Learn this hierarchy — it’s the most direct lever you can pull on your score.
| Command Word | What Examiner Wants | Answer Length | Typical Marks | Question Stem Example | Model Answer Skeleton |
|---|---|---|---|---|---|
| State | A simple fact or property | 1-2 words or a short phrase | 1 mark | “State one advantage of using fibre optics.” | “Higher bandwidth.” |
| Define | Precise meaning of a term | 1 sentence | 1-2 marks | “Define the term ‘authentication’.” | “Authentication is the process of verifying the identity of a user or system.” |
| Describe | Features or characteristics without cause-effect | 2-3 sentences | 2 marks | “Describe the function of a router in a network.” | “A router forwards data packets between networks. It determines the best path using routing tables and connects different network segments.” |
| Explain | HOW or WHY — cause-and-effect reasoning | 3-4 sentences with clear reasoning chain | 2-3 marks | “Explain why parity checking cannot detect all transmission errors.” | “Parity checks only detect an odd number of bit flips. If an even number of bits change, the parity bit remains correct and the error goes undetected. This makes parity checking unreliable for detecting burst errors.” |
| Justify | Support a claim with evidence/reasons | 3-4 sentences, each a reason | 2-3 marks | “Justify the choice of peer-to-peer over client-server architecture for this system.” | “First, P2P reduces server costs since all nodes share resources. Second, it improves reliability because the system continues functioning if some nodes fail. Third, it scales naturally as more users join and contribute resources.” |
| Suggest | Propose a solution AND give a reason | 2-3 sentences: solution + because | 2-3 marks | “Suggest an appropriate backup method for a hospital database. Give a reason for your suggestion.” | “Use grandfather-father-son backup rotation. This retains multiple historical versions, allowing recovery from corruption that might not be detected immediately while balancing storage costs.” |
Notice the progression: State asks for a fact. Define asks for a definition. Describe asks for features. Explain demands a “because.” Justify wants multiple reasons. Suggest needs a proposal plus reasoning.
The most common downgrade? Writing a State-style answer (bare fact) when the question said Explain or Justify. That’s a guaranteed 1-mark penalty per question.
Worked contrasts: same topic, three depths
Let’s see how command words change the answer for the same topic. Here’s validation vs verification — a classic HA1 concept answered three ways.
Question A: State one difference between validation and verification.
Answer: Validation checks data reasonableness; verification checks data accuracy.
1 mark. Short. Factual. No cause-effect.
Question B: Explain why validation cannot catch all data entry errors.
Answer: Validation only checks if data falls within acceptable rules, such as range or format. It cannot detect errors that still comply with those rules. For example, entering “90” for age might pass a range check (1-120) even if the correct value was “19”. Validation accepts reasonable-but-wrong inputs.
2-3 marks. Explains the limitation. Uses an example. Shows the reasoning chain.
Question C: Justify the use of both validation AND verification in a student enrollment system.
Answer: First, validation should be used to catch obvious input errors immediately, such as invalid phone numbers or impossible birth dates. This reduces wasted processing time by filtering errors at entry. Verification should then be used to confirm the accuracy of data that passes validation, such as confirming phone numbers via SMS or checking student IDs against school records. Using both ensures efficiency AND accuracy, which neither method achieves alone.
2-3 marks. Two distinct reasons. Each reason supports the claim. The combination argument (“neither achieves alone”) earns the third mark.
The topic never changed. The depth did. And that’s exactly what examiners reward — matching your answer depth to the command word.
Structured-question technique
Beyond the ladder, here are the battle-tested rules for Paper 2 structured questions:
Answer in the language of the question. If the question says “Explain,” your answer must use causal language (“because,” “due to,” “leads to,” “results in”). If it says “Compare,” use contrastive language (“whereas,” “while,” “unlike”). Marker fatigue is real — signal your structure with signpost words.
One mark ≈ one distinct point. For a 2-mark “Give two examples” question, list two separate items. For a 3-mark “Explain” question, give three linked ideas (premise → reasoning → conclusion). Don’t write five sentences when three earn full marks — you waste time and invite contradictions examiners can penalize.
Always give the “because” for Explain/Justify. The single most common mark deduction is missing the reasoning chain. “It is faster” earns 1 mark. “It is faster because solid-state drives have no moving parts, eliminating seek time and rotational latency” earns 2-3 marks. The “because” is where the marks live.
Use technical precision. “The computer saves the file” is vague. “The OS writes the file to non-volatile storage” earns marks. DSE ICT examiners reward precise terminology — that’s half the point of testing a syllabus.
Watch for compound questions. Many DSE questions combine command words: “(i) State the function of X. (2 marks) (ii) Explain why Y is preferred over Z. (3 marks).” Answer (i) briefly. Expand (ii) fully. Don’t conflate them — each sub-question earns marks independently.
MC technique
Paper 1 MC (40 questions, no negative marking) has its own command-word pattern — the options often embed absolute qualifiers that rule themselves out.
Eliminate absolutes. Options with “never,” “always,” “must,” “cannot” are usually wrong in DSE MC. Real systems have exceptions. If you see “ASCII can represent all characters,” eliminate it — Unicode exists. If you see “ROM is volatile,” eliminate it — ROM is non-volatile by definition. Absolutes = red flags.
Watch (1)/(2)/(3) combination options. These triple-choices appear frequently (e.g., “A. (1) and (2) only,” “B. (2) and (3) only,” etc.). Your strategy: evaluate each numbered statement individually first. If (1) is wrong, eliminate all options containing (1). Then choose between the remainder. Don’t read the A/B/C/D first — let the statements guide you.
Never leave blanks. Paper 1 has no penalty for wrong answers. If you’re unsure, eliminate obviously wrong options and guess from the remainder. Even a 25% guess rate beats 0%. Time-management rule: if you’re stuck on one MC for more than 2 minutes, mark it and move on. Return later if time permits.
Read the command word in the stem. Even MC questions use command words. “Which statement best DESCRIBES…” means you’re choosing the most accurate feature summary. “What EXPLAINS why…” means you’re choosing the cause-effect option. The verb in the stem tells you what kind of answer you need.
Where this fits in your prep
Command-word mastery isn’t a substitute for knowledge — it’s a force multiplier. When you know the concept AND how to answer at the right depth, every past-paper practice session compounds faster. You stop losing marks to avoidable errors and can focus on deep learning the syllabus.
For a broader roadmap, see our complete HKDSE ICT preparation guide. For structured-question practice on specific topics, dive into our HKDSE ICT notes.
Command-word drilling works best with feedback. Write a structured answer. Have it graded. Learn where you under-answered. Repeat. That feedback loop is what separates students who plateau at Level 4 from those who break through to Level 5.
Ready to master command words with feedback? Book a trial lesson — we’ll review your past-paper answers together and calibrate your answer depth to examiner expectations.