How CertifyAIx practice questions are written

Most certification practice sites share one weakness: you cannot tell where their questions came from. Some are copied from real exams, which breaks the candidate agreement you sign with the provider and can cost you the certification. CertifyAIx works differently, and this article explains exactly how.

1. We start from the official exam guide

Every certification provider publishes some form of exam guide: the domains the exam covers, often how much each one weighs, and the tasks and skills inside each domain. We take that guide as the source of truth for scope, and nothing else. Product and feature names come from the provider's current documentation, because guides often lag behind renames.

We record the guide we wrote against: where it came from, the date we fetched it and, where the provider numbers its versions, the version. Certification pages show the guide's "as of" date where the provider publishes one. Each guide is pinned with a checksum, so a change can be detected; when a provider publishes a new version, we compare it with the one we wrote against and revise or remove the questions the change affects.

2. Every question is original

Our questions are written by us, to rehearse the skills the guide lists. We never use questions from a live or past exam, from "dump" sites, or from another company's question bank. The scenario, company, numbers and wording are always our own.

Because we do not copy, we also do not claim that any question "will be on the exam". What we promise is narrower and more useful: if you can answer our questions and understand the explanations, you have practised the skills the exam guide says it tests.

3. Every task covered, mocks weighted like the real exam

Each question is pinned to one task in the exam guide. We size a bank by how much material each domain contains rather than by exam weight alone: the weight tells you how many questions the exam asks, but the number of tasks tells you how much there is to learn. A certification is not finished until every task in the guide has at least three questions, so no part of the guide is left without practice.

Exam weighting applies where it matters most, in the full-length mocks. Each mock gives every domain the same share of its questions as the real exam does.

4. The real question formats

Many exams use more than single-choice questions: multiple response, hot area, drag-and-drop, ordering, matching and case studies. Our question engine supports these formats, and for each certification we use only the kinds that exam uses, so you do not practise a format you will never see. Where a provider does not publish its question types, that choice is an editorial one and we keep to it. Each certification also has a scoring rule that decides whether a multi-part answer earns partial credit.

5. Explanations that teach

Every question explains why the right answer is right, why each wrong option is wrong, and which official documentation to read next. Every distractor is written to be wrong for one nameable reason, and that reason is stated in the explanation. The explanation is where most of the learning happens.

6. Practice that matches how you study

• Domain papers of up to 25 questions, timed at 60 minutes per 25 questions. Each domain is cut into mixed papers (all its topics in proportion) and topic papers (one exam-guide topic, or a few small neighbouring topics grouped together), so you can study in focused sessions.
• Full-length mock exams with the same time limit and domain weighting as the real exam, and its question count, or the midpoint of the range where the provider publishes one.
• Progress by domain and topic: accuracy for every part of the guide, so you know what to study next.

What we do not do

We are not affiliated with any certification provider, we do not guarantee a pass, and we never publish content from a live exam. If you ever see something on CertifyAIx that you believe breaks these rules, our [takedown process](/legal/takedown) explains how to report it.

Frequently asked questions

Are CertifyAIx questions taken from real exams?

No. Every question is written in-house against the provider's public exam guide. We do not use live or past exam items, dump sites or other companies' question banks, and official sample questions are used only to measure style, such as question length and the mix of formats, never as content.

What happens when a provider updates its exam guide?

We compare the new version with the one our questions were written against. Questions tied to tasks that changed or disappeared are revised or removed, and new tasks get new questions, because a bank written against a superseded guide rehearses the wrong exam.

Why do your questions avoid prices, context windows and model versions?

Those numbers change often, and a question built on one can become wrong without anyone noticing. We write questions about choosing an approach, evaluating a result or diagnosing a failure instead, which stay valid when the numbers move.

Can a question bank prepare me for hands-on parts of an exam?

Only partly. Some exams include work in a live environment, such as a real LangSmith organisation for the LangChain Certified Agent Engineer exam or writing Cypher for the Neo4j and Generative AI Certification. Our questions rehearse the knowledge that work rests on, and the certification page says where you also need practice in the real tool.

How should I use the mock exams?

Take them late in your preparation, under real conditions, once you have worked through the domain papers. Each mock has the real exam's time limit and domain weighting, and its question count (or the midpoint of a published range, such as 55 for a 50–60 question exam), so it is a rehearsal of the sitting rather than another practice set. Our guide to [using practice exams effectively](/blog/how-to-use-practice-exams-effectively) explains why.

CertifyAIx is independent and not affiliated with any certification provider. All CertifyAIx practice questions are original.