Microsoft Foundry for AI-901: A Plain-English Guide to the Exam's Biggest Topic

Microsoft Foundry is Azure's single platform for building AI applications, and it makes up 55–60% of the AI-901 exam — the largest topic by a wide margin. If you deeply learn only one thing for AI-901, make it Foundry. Here is what it is, and the specific parts the exam tests, in plain English.

What Microsoft Foundry is

Foundry is one Azure platform for building and running AI apps. Rather than wiring together separate services, you get models, tools, and agents in one place, with shared sign-in, access control, and monitoring across all of them.

You work with it two ways. One is the Foundry portal, a website where you deploy models, build agents, and watch what you have built. The other is code, using the Foundry SDK. One naming detail to get straight: Foundry was previously called Azure AI Foundry, and before that Azure AI Studio. The exam uses the current name, Microsoft Foundry.

The parts AI-901 actually tests

The full platform is enormous — enterprise governance, hundreds of connectable tools, teams of agents working together. AI-901 tests a focused, entry-level slice of it. These are the pieces to know:

• The portal and model deployment — deploying a model and trying it out inside the Foundry portal.
• The model catalog — Foundry offers a large catalog of models from Microsoft, OpenAI, and other providers; the exam expects you to pick a suitable one for a given task.
• Prompts — writing clear system and user prompts to steer a model's output.
• The Foundry SDK — building a small chat client in code that calls a deployed model. This is where a little Python helps.
• Agents — creating and testing a simple, single-agent solution with Foundry Agent Service.
• Foundry Tools and Azure Content Understanding — using Foundry's built-in tools for text analysis, speech, and computer vision, and pulling structured information out of documents, images, audio, and video.

That last group matters for how the exam is organized. The classic AI workloads — vision, speech, language, information extraction — now appear in AI-901 as things you do inside Foundry, not as separate services to memorize.

How Foundry shows up on the exam

At the fundamentals level, the exam is not asking you to build production systems. It wants two things: that you can recognize what each piece is for, and that you have done the basic hands-on version at least once. That means deploying a model, sending it a prompt, watching a simple agent respond, and running a document through Content Understanding.

This is why people who only read struggle with the Foundry half. The questions reward recognition that comes from having actually clicked through the portal, not from a summary.

How to try Foundry for free

You can explore Foundry with an Azure account by signing in to the Foundry portal at ai.azure.com. Deploy a small model, open a playground, and send it a prompt. That single hour of hands-on does more for the Foundry half of AI-901 than hours of reading about it. Then try one step further each session — an agent, or a document run through Content Understanding. Keep going until each piece above is something you have done, not just read about.

When you want to check whether it has stuck, our AI-901 practice exams test this exact Foundry scope — every question traceable to the official Microsoft page behind it, no dumps. For the full picture of the exam beyond Foundry, start with our AI-901 exam guide.