I Built a Free Trainer for the Claude Certified Architect Exam

I am studying for the Claude Certified Architect, Foundations exam. It is Anthropic's certification for people who build real systems on Claude, and since that is literally my job, I figured I should have the piece of paper.

So I did what I do for everything now. I asked Claude for a practice test.

It gave me a decent one. Thirty questions, five domains, explanations. I took it and got most of them right, which felt great for about ten minutes, until I noticed why. The correct answer was always the longest option and the only one with any technical words in it. I was not passing on knowledge. I was passing on test-taking instinct.

That bugged me enough to rebuild the whole thing. What came out is below, and you can use it right now, for free, no signup.

What is different about it

I had heard that being corrected right after each answer helps you learn faster, so I asked Claude what else the research says. It turns out there is a whole field on this, and almost none of it shows up in the practice tests people actually use. Here is what the trainer does:

• You answer from memory. That is the learning. Reading documentation gives you the feeling of understanding without the recall.
• You rate your confidence before you see the answer. Being sure and wrong is the correction your brain holds onto hardest. The trainer flags those and makes you read the explanation twice.
• You get corrected immediately. The right answer, the reasoning, and one line on why each wrong option is wrong.
• Misses come back. Later in the same round, then tomorrow, then in three days, a week, two weeks. Things you have mastered stop showing up.
• Ten questions at a time, domains mixed the way the real exam mixes them. Ten minutes a day beats a Saturday marathon.

The questions are all workplace scenarios: an agent that has to decide when to escalate to a human, a tool that fails silently in production, a coding session that keeps ignoring the team's conventions. Every option is the same length and the same level of technical, and the wrong answers are real techniques applied in the wrong place. You have to know why.

There are 120 questions today and I am adding batches until it reaches 600. Mock exams pull 30 questions in the official domain proportions, favoring whatever you have not mastered, so a perfect mock actually means something.

The privacy part

Your progress lives in your own browser, on your own computer. Nothing is sent to me. There is no account, no email, no database, and no way for anyone to see who used this or how they scored. If you switch computers you start fresh. That is the trade for not having to trust anyone with anything.

How to use it

Do a round or two a day. Read the corrections even on the questions you got right; the "why the others are wrong" lines are where the near-miss knowledge lives. Take a mock every few days, and aim for two in a row above 90 percent before you book the real thing. And build the actual things: an agent loop, a hook, a cache miss you can see in a request. The trainer tells you what you do not know. A terminal fixes it.

One honest disclaimer: this is an unofficial study aid I wrote from the public exam blueprint and the documentation. It is not affiliated with Anthropic and no question comes from the real exam. Check Anthropic's certification pages for the current format before you register.

If you use it, tell me your mock score. And if you are going for the cert, good luck. I will see you on the other side of the proctor.

The trainer

Works on phone and desktop. Also available on the White Rabbit Advisory Group site.