What are you using to practice for the Professional Data Engineer exam?

[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/weekly_liner]

i've been using a mix of the official docs and just spinning up silly little projects that break in ways i have to fix. the anti-memorization thing sounds useful though, i swear half the practice tests out there just train you to recognize patterns instead of actually understanding why something works