Updated remark completed: Paper 1A is now marked using the exact answer list you provided in the attached document “Paper”. The report below also recalculates the final ICT score out of 100 using Paper 1 = 65% and Paper 2 = 35%.

HKAICT ICT Mock Examination Report

Detailed report for Paper 1A, 1B, 2A and 2B in interactive HTML and printable PDF layout

Candidate Name

To Chun Hei

Candidate Number

26978210

Components Marked

Paper 1A, Paper 1B, Paper 2A, Paper 2B

Marking Standard

Based on HKDSE ICT knowledge, syllabus expectations and common marking principles

Final Weighted ICT Score

Paper 1 = 65%, Paper 2 = 35%

73.45 / 100

Overall weighted percentage: 73.45%

This is a clearly improved result after re-marking the MCQ accurately. Your overall profile is now stronger than the previous estimate, especially in Paper 1A.

Paper 1A

33 / 40

82.5%

Paper 1B

45 / 60

75.0%

Paper 2A

15 / 30

50.0%

Paper 2B

24 / 30

80.0%

Raw paper totals

Paper 1: \(33 + 45 = 78/100\)
Paper 2: \(15 + 24 = 39/60 = 65/100\)

Weighted contributions

Paper 1 contribution: \(78 \times 0.65 = 50.70\)
Paper 2 contribution: \(65 \times 0.35 = 22.75\)
Total: \(50.70 + 22.75 = 73.45\)

Overall judgement: Your performance is now a fairly solid paper overall. Paper 1 is good, with a particularly strong MCQ score. Paper 2B is also strong. The main area holding down the final mark is Paper 2A Databases, followed by some precision issues in long questions.

Part 1 — Marking

All questions are marked according to the HKDSE ICT syllabus knowledge and typical marking expectations.

Paper 1A — Multiple Choice: 33 / 40

Q	Topic	Your Ans	Correct Ans	Mark	Reason
1	Data capture error	B	B	1/1	Correct. Entering `z` as `2` while copying data is a transcription error.
2	Sign-and-magnitude	C	C	1/1	Correct. Each coordinate needs 5 bits, so total 10 bits.
3	Binary to decimal	D	D	1/1	Correct. `10011000` unsigned is 152.
4	Parity check	A	A	1/1	Correct.
5	QR code vs barcode	C	C	1/1	Correct. QR code has higher error-correction capability.
6	Audio quality	C	C	1/1	Correct. Audio quality is affected by bit depth and sampling rate.
7	Image formats	D	D	1/1	Correct. SVG is not suitable for storing ordinary photographs.
8	Character coding	D	D	1/1	Correct. The bytes shown match UTF-8.
9	Digitisation	A	A	1/1	Correct. A camera is used for digitisation.
10	Spreadsheet tool	A	A	1/1	Correct. Pivot table is the best tool here.
11	Spreadsheet formula	B	B	1/1	Correct. The value is 74.
12	SQL `LIKE`	D	B	0/1	Only one record is selected. The correct count is 1.
13	Printer driver	A	A	1/1	Correct. The OS may already have the driver installed.
14	Real-time processing	D	D	1/1	Correct.
15	Output device	C	C	1/1	Correct. Plotter is suitable for large precise engineering drawings.
16	Internet connection	B	B	1/1	Correct.
17	Ports and interfaces	A	B	0/1	An external SSD can be connected through Thunderbolt. RJ-45 is a network port.
18	MAC address	A	A	1/1	Correct.
19	Wi-Fi band	C	C	1/1	Correct. 2.4 GHz is better for larger coverage.
20	IPv6	D	D	1/1	Correct.
21	Router functions	C	C	1/1	Correct.
22	Domain names	B	B	1/1	Correct.
23	Web video access issue	C	C	1/1	Correct.
24	Smart city	D	A	0/1	Smart agriculture is the option that is not normally regarded as a smart city initiative here.
25	Algorithm tracing	A	A	1/1	Correct.
26	Algorithm tracing	A	A	1/1	Correct.
27	Boolean expression	A	A	1/1	Correct.
28	Flowchart	B	B	1/1	Correct. Output is 900.
29	Error type	D	D	1/1	Correct.
30	Loop output	D	D	1/1	Correct.
31	Loop tracing	B	B	1/1	Correct.
32	Testing	D	D	1/1	Correct.
33	Loop equivalence	A	C	0/1	To match the `REPEAT...UNTIL` behaviour, ALG1 needs an initial `B ← B + 1`.
34	Loop condition	D	D	1/1	Correct.
35	Sentinel condition	C	A	0/1	`X > 0` controls when the algorithm stops. The closest correct description is that it stops when a negative value is entered.
36	Flowchart equivalence	D	D	1/1	Correct.
37	Array algorithm	D	D	1/1	Correct. The code swaps the first and last elements.
38	Copyright protection	B	D	0/1	All three measures can be applied, so the answer is (1), (2) and (3).
39	Digital divide	C	D	0/1	Giving a free laptop to every citizen without one is the least feasible option.
40	3D printing	C	C	1/1	Correct.

Paper 1B — Section B: 45 / 60

Question	Mark	Reason
Q1	4 / 4	All parts acceptable. Good decoding, valid storage benefit, and AI application accepted.
Q2	4 / 4	Good basic hardware, OS and wireless security understanding.
Q3	4 / 4	Both technical reasons and both design suggestions accepted.
Q4	5 / 6	Main loss was Q4(b)(i): worm characteristic stated incorrectly.
Q5	4 / 6	Tracing was strong, but reverse reasoning and algorithm purpose were weaker.
Q6	10 / 12	Spreadsheet work was strong; main losses were SQL rigor and mixing up authorisation/authentication.
Q7	6 / 10	Basic array update okay, but escalator algorithm and invalid-test-case reasoning cost marks.
Q8	8 / 10	Good on storage/hardware and lossy MP3 reasoning; weaker on cloud vs virtualisation and audio-quality attribute.

Paper 2A — Databases: 15 / 30

Question	Mark	Reason
Q1	1 / 3	SQL1 minimum correct. SQL2 minimum/maximum not accepted.
Q2	2 / 6	Some idea of denormalisation and anomaly shown, but SQL syntax and filtering were incomplete.
Q3	1 / 4	Some relationship idea present, but cardinality and optional participation were not handled correctly.
Q4	3 / 4	Table design issues identified well; rollback answer was relevant but not specific enough.
Q5	8 / 13	Some SQL was correct, especially join/index basics, but NULL logic, correlation and aggregation details were weak.

Paper 2B — Web Applications Programming: 24 / 30

Question	Mark	Reason
Q6	2 / 2	Protocol and ACL purpose both correct.
Q7	5 / 5	Very good UI sketch and correct examples of client-side and server-side scripting.
Q8	4 / 4	All server questions correct.
Q9	4 / 4	Good networking fundamentals.
Q10	9 / 15	Good general web understanding, but metadata, CSS selector logic, and some PHP details cost marks.

Part 2 — Summary

Analysis of performance on MC, Paper 1 long questions, and each question in Paper 2.

MCQ performance summary

Paper 1A score: 33/40.
This is a strong MCQ performance.
You answered most core theory questions correctly across data representation, networking, spreadsheet, flowchart and algorithm tracing.
You only lost marks in 7 questions, mainly because of precision rather than lack of knowledge.
The wrong questions were concentrated in SQL pattern matching, hardware interface detail, smart city concept, loop equivalence, sentinel description, copyright protection and digital divide feasibility.

Paper 1 long question summary

Q1: Strong. Accurate understanding of custom encoding and a valid AI application.
Q2: Strong. Clear OS and wireless security basics.
Q3: Strong. Good practical website awareness.
Q4: Fairly strong. Only the worm concept was wrong.
Q5: Mixed. Good tracing, weaker on deeper algorithm interpretation.
Q6: Strong. Spreadsheet work is one of your stronger areas.
Q7: Weakest question in Paper 1B. Algorithm design and testing logic need improvement.
Q8: Moderate to good. Practical ideas okay, but some theory wording was inaccurate.

Paper 2A summary

Q1: Weak. Min/max result questions in SQL set/join logic need more careful reasoning.
Q2: Weak. You had the idea of adding a field and creating a view, but the SQL needed to be more exact.
Q3: Weak. ER diagram modelling is a major weak area.
Q4: Fair. Table design issues were identified reasonably well.
Q5: Moderate. Some join and index work was right, but more complex SQL filtering and NULL logic lost marks.

Paper 2B summary

Q6: Strong. Basic protocol and permission control were secure.
Q7: Very strong. Your UI design and process examples were good and practical.
Q8: Strong. Good understanding of server roles.
Q9: Strong. Good DHCP, MAC and addressing fundamentals.
Q10: Mixed. You know the general web ideas, but exact syntax and selector detail need tightening.

Overall pattern: Your performance is best when the question is practical, concrete and close to real use. You are weaker when the question needs exact database syntax, exact definitions, or abstract reasoning about conditions and structures.

Part 3 — Mistakes

All wrong questions or main mark-loss areas across every paper, with analysis.

Paper 1A wrong questions

Q12: SQL LIKE pattern matching. You likely did not track the underscore position carefully. This is a detail-reading mistake.
Q17: Port/device interface knowledge. This is a straightforward factual recall question and should be an easy mark next time.
Q24: Smart city initiative classification. This suggests some uncertainty in the “social implications / current applications” part of the syllabus.
Q33: Loop equivalence. You can trace algorithms, but transforming one loop form into another is weaker.
Q35: Sentinel-controlled loop purpose. You understood that the condition controls the loop, but not the exact role expected in exam wording.
Q38: Copyright protection measures. This was a syllabus fact question about software protection methods.
Q39: Digital divide feasibility. This is another concept judgment question based on practicality, not merely theory.

Paper 1B wrong / partial-loss questions

Q4(b)(i): Worm characteristic was reversed. A worm does self-replicate.
Q5(b), Q5(c): You could follow the steps, but you were less confident about reconstructing the input or stating the overall algorithm purpose.
Q6(d)(ii): SQL rigor issue. You answered as if the statement had GROUP BY.
Q6(e)(ii): Authorisation and authentication were mixed up.
Q7(a): You described total passengers entering and leaving, instead of the net onboard passenger count.
Q7(c): Algorithm condition and distribution logic were not exact enough.
Q7(d): Your invalid test case explanations were too vague.
Q8(a)(i): Cloud computing vs virtualisation was not defined accurately.
Q8(c)(ii): You did not give the syllabus-expected attribute affecting audio quality.

Paper 2A wrong / partial-loss questions

Q1: Join/set reasoning under constraints needs improvement. These are logic questions, not just syntax questions.
Q2: The database idea was there, but the SQL form was not safe enough for full marks.
Q3: ER diagram was the weakest area. Cardinality and participation constraints need major revision.
Q4(b): “Rollback” was relevant but too general. The question wanted specific changes on users and transaction records.
Q5(d), Q5(e): NULL logic, correlation and filtering conditions were the main problems.

Paper 2B wrong / partial-loss questions

Q10(a): Your CMS disadvantage was not specific enough to the system.
Q10(b)(iii): You gave examples of content, not metadata.
Q10(c)(i): You missed the detail that id="#hero" does not match selector p#hero.
Q10(d)(ii): The row-count condition was reversed.
Q10(d)(iii): You used the wrong PHP variable for the fetched row.

Main mistake pattern: Most of your lost marks came from precision errors, not from total misunderstanding. This is good news, because precision can be improved quite quickly with focused practice.

Part 4 — Improvement

Weakness diagnosis and personal feedback for future improvement.

Your main weaknesses

Exact ICT terminology: e.g. worm, authorisation vs authentication, cloud vs virtualisation.
Database precision: especially GROUP BY, NULL, views, subqueries, and ER diagrams.
Algorithm abstraction: you can often trace code, but you are weaker at saying what the whole algorithm is actually doing.
Condition logic: loop equivalence, sentinel conditions and boundary checks still cost marks.
Detail-checking in web coding: metadata names, CSS selector matching, variable naming and reversed conditions.

Your strengths

Strong MC foundation: 33/40 is a very good Paper 1A score.
Good practical sense: especially in networking, spreadsheet use and web application scenarios.
Better in applied questions than in highly abstract ones.
Good marks in Web Applications: this is one of your strongest modules.
Capable of improvement: because your mistakes are often fixable precision issues.

Personal feedback

You are doing better than the earlier estimate suggested. The re-marked MCQ shows that your fundamentals are actually quite solid.
Your strongest message from this paper is: you do know a lot of the syllabus.
The next stage is not to relearn everything from the beginning. The next stage is to make your answers more exact, more exam-safe and more precise.
If you improve your database section and tighten your exact wording in theory questions, your total can go up noticeably.
In other words, your ceiling is higher than this score. The key is refinement, not rebuilding from zero.

Priority 1

Databases

Practise SQL with JOIN, GROUP BY, HAVING, NULL.
Redo ER diagram questions with cardinality and optional participation.

Priority 2

Terminology

Make a revision list of common definition traps.
Memorise short textbook-safe definitions, not vague explanations.

Priority 3

Algorithm purpose

After tracing an algorithm, always write one sentence: “This algorithm is used to...”
Practise condition conversion between WHILE and REPEAT...UNTIL.

Suggested short improvement plan

Focus	What to do
Database	Redo 15 SQL questions and 5 ER diagram questions. Write the correct answer fully, not just the final line.
Paper 1 theory	Revise all 7 wrong MC questions and write one line explaining why the correct option is correct.
Algorithms	Practise 10 loop/array questions and focus on “purpose of algorithm” and “condition meaning”.
Web detail	Revise HTML metadata, CSS selectors and PHP variable/result handling.

Final comment: With the corrected MCQ, your paper looks much healthier. Your biggest opportunity now is Paper 2A. If you improve database modelling and SQL precision, your final ICT result can rise quite significantly.