COMPUTER-SCIENCE-H446 · Cambridge OCR A Level
COMPUTER-SCIENCE-H446/21
Paper 2
Computer Science · June 2023 · Variant 1
Relative difficulty
Analysis source: OCR
Analysis aligned to the official syllabus and assessment design.
3.8 / 5
280
300 min
Programming techniques
Cohort performance
Session statistics from official examination reports
Total marks
280
Duration
300 min
Session difficulty
3.8 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming.
Rather than relying on simple recall, the examiners required candidates to perform extensive technical dry-runs, write lengthy class definitions, and critically evaluate legal and technical trade-offs in essays.
Question difficulty map
How candidates performed on each question in this series
No data available in official reports
Assessment objectives
Skill and AO weighting from official examiner commentary
Skill weighting
Shows the skill mix this paper tested most heavily.
Analytical and
Weight: 7100%Algorithmic Design
Weight: 686%Mathematical and
Weight: 457%Trace and
Weight: 343%Simulat
Weight: 229%Technical and
Weight: 114%
Method marks watchlist
Where working, steps, or method marks were commonly lost
No data available in official reports
Recurring mistakes across years
Themes examiners flag in multiple recent sessions for this subject
No data available in official reports
Question choice intelligence
Mean scores and popularity for optional questions (HKDSE electives)
No data available in official reports
Level exemplars
What candidate scripts at each grade level looked like
No data available in official reports
Grade & admission context
How marks relate to grade thresholds and entry standards
Report type
Examiner report — national grade boundaries and question-level commentary
Deep insights
What top candidates did
Techniques and approaches examiners rewarded in this series
No data available in official reports
Command word playbook
How to match each command word to the expected response style
Give reasons and link mechanism to outcome; each point needs a because/so chain.
State features in sequence or list observable properties — do not explain causes unless asked.
Match the expected response style for “Give” questions.
Match the expected response style for “State” questions.
Match the expected response style for “Write” questions.
Weigh arguments for and against with evidence; end with a supported judgement.
Match the expected response style for “Complete” questions.
Identify similarities and differences explicitly — paired sentences or a table helps.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 2
Min per mark: 1.1
Min per mark: 1.1
Min per mark: 1.1
Min per mark: 1.1
Min per mark: 1
Syllabus traceability
Topics linked to questions and mark weighting in this session
Programming techniques
59 marks this session
Data Structures
54 marks this session
Algorithms
28 marks this session
MCQ trap analytics
Commonly chosen wrong options from examiner commentary
No data available in official reports
Topic heatmap across years
Mark concentration by topic and exam year for this subject
Mark intensity
Programming techniques
Data Structures
Algorithms
Structure and function of the processor
Data Types
Paper comparison
Marks and duration breakdown across papers in this session
H446/01: Computer Systems: H446/02: Algorithms and Programming:
Marks you can still earn
Where valid approaches outside the mark scheme may still gain credit
No data available in official reports
Practise what examiners flagged
Target weak topics from this report inside the Revui app
Programming techniques
59 marks this session
Practise in RevuiData Structures
54 marks this session
Practise in RevuiAlgorithms
28 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming.
- 2Message
Rather than relying on simple recall, the examiners required candidates to perform extensive technical dry-runs, write lengthy class definitions, and critically evaluate legal and technical trade-offs in essays.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2023 2023
Computer Science
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming. Rather than relying on simple recall, the examiners required can
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming.
Rather than relying on simple recall, the examiners required candidates to perform extensive technical dry-runs, write lengthy class definitions, and critically evaluate legal and technical trade-offs in essays.
- Total marks
- 280
- Duration
- 300 min
- Session difficulty
- 3.8 / 5
Session analysis
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming. Rather than relying on simple recall, the examiners required candidates to perform extensive technical dry-runs, write lengthy class definitions, and critically evaluate legal and technical trade-offs in essays.
Updated Jun 14, 2026
Paper breakdown
H446/01: Computer Systems: H446/02: Algorithms and Programming:
Top chapters
Exam structure insights
Marks by chapter
See where the marks were concentrated so revision time goes to the highest-value topics.
Mark accessibility
Estimate which marks were basic, mid-level, or high-difficulty.
79% within easy or medium reach
Command word frequency
Spot common command words so answers match the expected response style.
Question type mix
Compare the mark share of each paper section and question type.
short_answer_and_structured
175·48·63%
extended_prose_and_evaluation
57·6·20%
programming_and_algorithms
48·10·17%
Study ROI
Bigger bubbles recur more often; higher bubbles carry more marks, helping you rank revision priorities.
Difficulty trend
Compare difficulty across recent years.
Time vs marks
Compare marks with suggested time allocation to plan exam pacing.
H446/01: Q1 (OS, Ne
0.50 m/minH446/01: Q2-Q3 (Dat
0.97 m/minH446/01: Q4 (Web, L
0.88 m/minH446/01: Q5-Q7 (Pro
0.90 m/minH446/02: Section A
0.94 m/minH446/02: Section B
0.89 m/minTotal marks
194
Total time
221 min
Avg pace
0.88
Cumulative marks ladder
The line is your running mark total question by question; dashed lines are the estimated grade cut-offs. See which question the line crosses your target grade at, so you know how far you must answer cleanly and which questions decide a band.
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Structure and function of the processor
95%95%
Databases
85%85%
Moral and ethical Issues
80%80%
Overall Difficulty Verdict
The 2023 OCR A-Level Computer Science (H446) papers presented a moderately high difficulty level (4/5 stars), characterized by a heavy shift towards applied algorithmic design and robust object-oriented programming. Rather than relying on simple recall, the examiners required candidates to perform extensive technical dry-runs, write lengthy class definitions, and critically evaluate legal and technical trade-offs in essays.
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.