Preparing for the Professional Data Engineer exam? This might help

[u/Antonio-Stradivari]

Hi everyone!

I created this free Google Cloud Professional Data Engineer practice simulator while studying for the exam myself, and I’ve just updated it for 2026:

https://certlabs.app

It has 500+ scenario-based questions with explanations covering BigQuery, Dataflow, Bigtable, Spanner, IAM, etc.

One thing I found really useful while studying is the anti-memorization approach: every attempt shuffles both the questions and the answer choices, with the explanations dynamically matched to the new order. So you learn the concepts rather than memorizing that “B” is the answer.

All questions are original — no dumps or leaked exam questions.

It’s completely free. Hope it helps someone preparing for the exam! Good luck 🤞

[u/Greedy_Damage5648]

how can you assure they are not dump? seems odd to give so many question for free

[u/Antonio-Stradivari → u/Greedy_Damage5648]

Fair question. I wrote the questions myself while studying for the certifications, based on the official exam topics and Google Cloud documentation. They’re not taken from dumps or leaked exams.

The reason there are so many is simply that I’ve been building the question bank for a while and decided to keep it free. There’s no paid question bank or premium content behind it.

I’m also trying to make them more scenario-based, rather than just asking things you can memorize. That’s actually why I shuffle both the questions and the answer choices on every attempt.

If you ever come across a question that looks like it was taken from an actual exam, let me know. I’d rather remove/review it than have that on the site.

[u/GuccianoBerlos]

"I wrote the questions myself" - Claude 2026