COMPUTER-SCIENCE · IB Diploma Programme
COMPUTER-SCIENCE/12
Paper 1
Computer Science · June 2025 · Variant 2
Relative difficulty
Analysis source: International Baccalaureate Organization
Analysis aligned to the official syllabus and assessment design.
3.4 / 5
115
150 min
Object-Oriented Programming and Design
Cohort performance
Session statistics from official examination reports
Total marks
115
Duration
150 min
Session difficulty
3.4 / 5
Key examiner messages
Top priorities from the principal examiner before you revise
The May 2025 Standard Level paper represents a highly balanced assessment.
With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision.
In Paper 1 Section A, standard questions on application interfaces and network configurations offered reliable baseline marks, whereas the logical diagram assembly and trace tables required absolute accuracy to avoid cumulative carry-through errors.
Compare difficulty across recent years. Compare topic weight by year to spot recurring and returning areas.
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.
Algorithmic Thinking
Weight: 8100%Theoretical Knowledge
Weight: 675%Java OOP
Weight: 450%Syntax & Coding Precision
Weight: 338%Systems
Weight: 225%Design &
Weight: 113%
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
IB subject report — grade distributions, IA weighting, and HL/SL distinctions
Level 7
Excellent — top band for competitive university offers
Level 6
Very good — strong HL performance
Level 5
Good — solid pass at higher level
Level 4
Satisfactory — minimum for many university credits
Level 3
Mediocre
Level 2
Poor
Level 1
Very poor
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
Name or point to the specific feature asked for — avoid extra explanation.
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 “Construct” questions.
Match the expected response style for “Outline” questions.
Match the expected response style for “State” questions.
Match the expected response style for “Define” questions.
Apply knowledge to an unfamiliar context; concise, practical points score best.
Time traps
Sections where candidates spent disproportionate time relative to marks
Min per mark: 1.2
Syllabus traceability
Topics linked to questions and mark weighting in this session
Object-oriented programming (OOP)
45 marks this session
System fundamentals
23 marks this session
Computational thinking
21 marks this session
Networks
20 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
Computational thinking
Networks
System fundamentals
Object-oriented programming (OOP)
Computer organization
Paper comparison
Marks and duration breakdown across papers in this session
Paper 1 (Core):
Paper 2 (Option D: OOP):
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
Object-oriented programming (OOP)
45 marks this session
Practise in RevuiSystem fundamentals
23 marks this session
Practise in RevuiComputational thinking
21 marks this session
Practise in RevuiNetworks
20 marks this session
Practise in RevuiSelf-diagnostic checklist
Key actions before you sit this paper — copy and tick off as you revise
- 1Message
The May 2025 Standard Level paper represents a highly balanced assessment.
- 2Message
With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision.
- 3Message
In Paper 1 Section A, standard questions on application interfaces and network configurations offered reliable baseline marks, whereas the logical diagram assembly and trace tables required absolute accuracy to avoid cumulative carry-through errors.
- 4Message
Compare difficulty across recent years. Compare topic weight by year to spot recurring and returning areas.
Teacher briefing pack
One-page session summary for tutors and classroom review
June 2025 2025
Computer Science
The May 2025 Standard Level paper represents a highly balanced assessment. With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision. In Paper 1 Section A, standard questions on application interfaces and net
The May 2025 Standard Level paper represents a highly balanced assessment.
With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision.
In Paper 1 Section A, standard questions on application interfaces and network configurations offered reliable baseline marks, whereas the logical diagram assembly and trace tables required absolute accuracy to avoid cumulative carry-through errors.
- Total marks
- 115
- Duration
- 150 min
- Session difficulty
- 3.4 / 5
Session analysis
The May 2025 Standard Level paper represents a highly balanced assessment. With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision. In Paper 1 Section A, standard questions on application interfaces and network configurations offered reliable baseline marks, whereas the logical diagram assembly and trace tables required absolute accuracy to avoid cumulative carry-through errors.
Updated Jun 14, 2026
Paper breakdown
Paper 1 (Core):
Paper 2 (Option D: OOP):
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.
78% 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.
Java Programming & Algorithms
48·3·42%
Short Answer / Theoretical
35·10·30%
Structured Scenarios / Diagrams
32·5·28%
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.
Paper 1 Section A
0.83 m/minTotal marks
25
Total time
30 min
Avg pace
0.83
Next-year prediction
Topics worth watching next year, with the reason shown directly below each bar.
Operating Systems & Resource Management
85%85%
Abstract Data Structures (Queues / Stacks)
75%75%
Difficulty Verdict & Overview
The May 2025 Standard Level paper represents a highly balanced assessment. With a difficulty rating of 3.4 out of 5, it avoided overly obscure theoretical topics, but tested students' structural precision. In Paper 1 Section A, standard questions on application interfaces and network configurations offered reliable baseline marks, whereas the logical diagram assembly and trace tables required absolute accuracy to avoid cumulative carry-through errors.
Exam tips
Paper format
- Duration
- 2h 10min
- Total marks
- 100
Analysis is paraphrased for study purposes. Always verify against the official examiner report and mark scheme.