AI-901 replaced AI-900, which Microsoft retired on 30 June 2026, and it awards the same credential: Microsoft Certified: Azure AI Fundamentals. If your study notes still say AI-900, this is now the exam you sit.
It is a fundamentals exam with a hands-on second act. The smaller of its two domains, identifying AI concepts and capabilities, covers the responsible-AI principles and when each applies, the main workload types, and what a model can and cannot be relied on to do. The larger domain is not conceptual at all. It is implementing AI solutions in Microsoft Foundry: deploying a model, grounding and filtering it, building agents, and checking output before a user ever sees it.
That split is the thing to plan around. The Foundry domain assumes basic Python and enough Azure familiarity to find your way around the portal, and reading about it is a poor substitute for building something small there. Some of the questions below are multiple-response, and their stems say how many options to choose.
Microsoft publishes these weightings as ranges; each figure shown falls inside its range.
11 questions
Question 1 of 25
Which capability identifies that two differently worded sentences mean the same thing?
Answer: B
Meaning comparison uses semantic representations.
Question 2 of 25
An organisation is deciding between fine-tuning a model and providing context in prompts. Which statement is correct?
Answer: C
Prompting works at inference; fine-tuning changes the model.
Question 3 of 25
A logistics firm wants to read licence plate numbers from camera images. Which capability is this?
Answer: A
Reading text in images is OCR, a vision capability.
Question 4 of 25 · multiple response
Which of the following are examples of computer vision capabilities? (Select TWO)
Answers: A, D
Object detection and OCR are vision; the others are speech.
Question 5 of 25
A team must pick a model for real-time chat where responses must start quickly. Which factor matters most?
Answer: C
Interactive chat is latency-sensitive.
Question 6 of 25
Which factor limits how much conversation history an application can send?
Answer: C
History is bounded by the context window.
Question 7 of 25
A team must explain why the same AI feature costs more some months. What is the likely cause?
Answer: B
Usage-based pricing varies with volume and tokens.
Question 8 of 25
A generative AI feature must not reveal one customer's data to another. Which principle applies?
Answer: A
Data isolation between users is a privacy and security concern.
Question 9 of 25
A business wants AI to draft responses that staff then edit and send. Which framing is accurate?
Answer: C
Human-in-the-loop keeps responsibility with the person.
Question 10 of 25
Which describes the role of evaluation data in an AI project?
Answer: C
Evaluation data measures readiness, distinct from training data.
Question 11 of 25
An AI solution must continue working correctly when it receives unusual or malformed input. Which principle applies?
Answer: D
Robustness under unexpected input is part of reliability and safety.
14 questions
Question 12 of 25
A company wants to extract product details from photographs taken by field staff. Which capability applies?
Answer: B
Content Understanding extracts information from images.
Question 13 of 25
A team must process ten thousand invoices per night with extraction. Which consideration matters most for the application design?
Answer: B
High-volume processing needs throughput and reliability design.
Question 14 of 25
What distinguishes an agent from a simple chat completion call in Foundry?
Answer: C
Agents add tool use and multi-step task execution.
Question 15 of 25
An application must support users who ask questions in a language the business does not support. What should it do?
Answer: A
Unsupported languages need detection and clear handling.
Question 16 of 25
An application takes spoken customer questions and must answer them aloud. Which Foundry Tools service handles the final step?
Answer: B
Synthesis produces the spoken reply.
Question 17 of 25
An agent needs to look up live order status from an internal system. What must be configured?
Answer: D
Agents access external data through configured tools.
Question 18 of 25
A developer must handle a model response that is longer than the application's display area. What is the appropriate approach?
Answer: C
Length is controlled by instruction and token limits.
Question 19 of 25
A developer must decide where to put a rule that the assistant should never give legal advice. Where does it belong?
Answer: D
Behavioural rules go in the system prompt and are verified in code.
Question 20 of 25
An application's responses must never include a competitor's name. Which approach is most reliable?
Answer: C
Instruction plus output validation enforces the rule.
Question 21 of 25
An application must summarize documents and highlight risks for a legal team. Which design fits?
Answer: C
Professional-review contexts need criteria and human sign-off.
Question 22 of 25
A team must hand a Foundry application over to an operations team. What should the handover include?
Answer: D
Operational handover covers monitoring and failure handling.
Question 23 of 25
An application must analyse the sentiment of reviews in eight languages. What should the team verify?
Answer: C
Language support must match the requirement.
Question 24 of 25 · multiple response
Which of the following are valid considerations when choosing a deployment region for a Foundry workload? (Select TWO)
Answers: A, B
Residency, availability, and latency drive region choice.
Question 25 of 25
A developer must decide how to handle a request the model answers slowly. Which approach fits?
Answer: B
Timeouts, streaming, and feedback handle slow responses.
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