ISO/IEC 42001 was published in late 2023. Past papers do not exist. The first cohorts of certified Lead Implementers are still being seated. If you are sitting this exam in the next few weeks, you are doing it without the multi-year deck of practice material that 27001 candidates take for granted.
This guide is the prep plan we wish someone had handed us when we were the candidate, not the trainer. It applies whether you are sitting with PECB, CQI/IRCA, Exemplar Global or TRECCERT (the four personnel certifiers offering 42001 schemes), or training via BSI, TUV or DNV whose 42001 courses are typically CQI/IRCA-accredited. The exam format differs slightly between providers but the underlying knowledge - ISO/IEC 42001:2023, ISO/IEC 23894:2023 AI risk guidance, and the practical implementation of an AIMS - is identical.
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What you are actually being tested on
42001 Lead Implementer exams test three things, in roughly equal measure:
- AIMS lifecycle and clause application - can you take a real organisation through scoping (4.3), planning (clause 6), operations (clause 8), and continual improvement (clause 10) and explain which clause requires what artefact at what point.
- AI-specific implementation judgement - can you choose the right Annex A control for a scenario, design an AI system impact assessment that satisfies clause 6.1.4, and write a risk treatment plan that uses ISO/IEC 23894 guidance correctly.
- Management-system implementation judgement - the same documented-information, competence, internal-audit, management-review judgement that any Lead Implementer exam tests, applied to AIMS instead of ISMS or QMS.
The first cohort of 42001 candidates almost universally underestimate point 2. Walking in with strong 27001 Implementer instincts is helpful for the High-Level Structure but actively misleading on Annex A and the AI-specific clauses.
The three traps that catch most 42001 Implementer candidates
Across the candidates we have coached, the same three trap patterns account for the majority of avoidable losses.
42001-specific
AI risk treatment vs AI system impact treatment
This is the single trap that catches almost every first-time 42001 Implementer sitter. The two artefacts live at different clauses (6.1.3 risk treatment, 6.1.4 + 8.4 impact treatment), use different inputs, and produce different output documents. Candidates routinely swap them in answers, and the exam routinely sets up scenarios where one is correct and the other is not.
Different clauses, different inputs, different output documents
The shorthand
Risk treatment = mitigate what could go wrong. Impact treatment = manage consequences on people.
If you cannot describe both documents and what goes in each without thinking, drill until you can. The exam will hand you a scenario and let you choose the wrong artefact.
42001-specific
Annex A control selection vs generic policy writing
Implementer candidates default to “write a policy” answers because that is the muscle memory from 27001 implementation. 42001 Annex A is more granular - it expects specific operational controls (A.6.2.4 testing, A.8.2 verification, A.9.3 data quality) tied to specific risks or impacts, not just umbrella policy statements.
A useful test: if your answer is “the organisation should document a policy that covers X”, you are almost certainly missing the Annex A control that operationalises X. Name the control, then describe how it is implemented.
42001-specific
AIMS scope vs AI system scope
The AI management system has a scope (clause 4.3). Each individual AI system inside it has its own scope (referenced in the impact assessment and Annex A controls). Implementer questions often hand you a scoping problem and the wrong answer will be the OTHER level.
A useful test: if the question asks what is in or out of certification, talks about stakeholders, or talks about organisational boundaries, the answer is AIMS scope. If it mentions a model, a use case, a training dataset, or affected users, the answer is AI-system scope.
Open-book strategy
PECB 42001 Lead Implementer (and most other providers) is open-book. The same rules apply as on any open-book exam: open-book means you can verify, not learn. Three hours is not enough to look up everything you do not remember.
Two specifics for 42001 Implementer
Pre-tab two standards. Annex A is reference, not memory.
ISO/IEC 42001:2023 and ISO/IEC 23894:2023 (AI risk guidance). Number-tab the implementation-heavy clauses (4.3 scope, 6.1 all of it, 7.2 competence, 7.5 documented information, 8.2 operational planning, 8.3 risk treatment, 8.4 impact treatment, 9.2 internal audit, 9.3 management review, 10.1 continual improvement, 10.2 nonconformity) and the Annex A control families.
42001 Annex A controls are listed by reference, not as a memorisation target. The exam tests whether you can navigate to the right one given a scenario and explain how to implement it, not whether you can recite all 38. Practise looking them up by topic, not by number.
Time management
A 12-question, 3-hour PECB exam gives you 15 minutes per question with no buffer. Real timing for 42001 Implementer answers:
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The second sanity check is where 42001 Implementer candidates win or lose. The standard is new enough that examiners specifically test term precision and clause-citation accuracy; sloppy answers that confuse risk and impact, or that fail to name the relevant Annex A control, lose marks they would otherwise carry.
The 2-to-4-week plan
If you are 2 weeks out:
- Days 1-4: Go through your course material end-to-end - the slides, handouts, implementation templates from the five-day course. Most candidates need ~4 focused days for this. Focus on clauses 6.1 (all of it - General, AI risk, AI risk treatment, AI system impact), 8 (operations including 8.3 and 8.4), and Annex A control families.
- Days 5-8: Active retrieval only. Drop the re-reading. Practice questions with rationales in Mindset Prep, especially on the risk-treatment-vs-impact-treatment trap and on Annex A control selection. (10 free per exam are on this site.)
- Days 9-11: One full mock under timed conditions. Score yourself honestly. Note every term-precision slip and every Annex A control you could not name.
- Days 12-13: Targeted re-read of the course-material sections + clauses you got wrong AND a fresh pass through 23894 risk-treatment language. Drill the trap patterns Mindset Prep surfaced in the mock.
- Day 14: Light review, light exercise, early sleep. Do not study the night before.
If you are 4 weeks out, double the active-retrieval phase and add a second mock exam. The biggest mistake 42001 Implementer candidates make at the 4-week mark is re-reading 42001 cover-to-cover again instead of drilling Annex A control selection and the risk-vs-impact distinction.
What 27001 Implementer experience does and does not buy you
If you already hold an ISO 27001 Lead Implementer credential, you start ~50% prepared. The High-Level Structure (clauses 4-10) is identical across both standards; the implementation lifecycle (gap analysis, scope statement, risk register, SoA, documented information, internal audit, management review) is identical in shape; the modal-verb discipline (shall vs should) is identical.
Carries across
~50% prepared
- High-Level Structure (clauses 4-10)
- Implementation lifecycle shape (scope, risk, SoA, internal audit)
- Documented-information discipline (7.5)
- Modal verb discipline (shall vs should)
Genuinely new
~50% fresh content
- AI-specific clauses (6.1.4, 8.4, AI-tagged Annex A)
- Risk treatment via ISO/IEC 23894 (not 27005)
- New Annex A control families (AI lifecycle, data, third parties)
- Impact treatment as a parallel process to risk treatment
A common failure pattern: senior 27001 Implementers over-confidently sit 42001 Lead Implementer, treat it as 27001-with-different-controls, and lose marks across the AI-specific clauses and Annex A control selection. Treat 42001 as its own standard.
The single biggest failure pattern
After dozens of 42001 Implementer candidates, the most common failure pattern is term confusion under time pressure. Candidates use “risk treatment” when they mean “impact treatment”, “AIMS” when they mean “AI system”, and reference 27001 Annex A numbering (A.5, A.8 themes) when the equivalent 42001 Annex A control is what the question is actually asking about.
Active practice with tagged trap patterns - knowing which trap each wrong answer uses - is what fixes term precision and Annex A reflexes. Re-reading 42001 is not. This is what Mindset Prep is built around.
Where to start
Try the 10 free ISO 42001 Lead Implementer practice questions. Each one is tagged with the trap pattern it tests and the exact 42001 or 23894 clause it draws from. If three or more catch you out, the full adaptive bank (250+ 42001 LI questions, alongside the 27001 LA + LI + 42001 LA banks) is the next logical step. The 3-day free trial gets you in.
If you are weighing whether to sit Lead Auditor or Lead Implementer first, the 42001 LA vs LI guide covers who hires which.