Cleared the Docker Certified Associate exam last week with a 78% and wanted to share what actually mattered vs what I spent too much time on. I studied for about 9 weeks, averaging 1.5-2 hours on weekdays and 4 hours on Saturdays. The exam is 55 questions across 6 domains with a 90-minute limit, which sounds generous but scenario-based questions eat time fast.
Domain 2 (Image Creation, Management, and Registry) and Domain 4 (Networking) made up the bulk of questions in my experience. Lean heavily into multi-stage builds, image layer caching, and overlay network drivers. I spent too much early prep on Swarm orchestration, which showed up way less than I expected.
The hardest questions were around security - content trust, image signing, and secrets management. If you're coming from a dev rather than ops background, that section probably needs extra attention. Spinning up a local lab and running through those scenarios hands-on was worth more than any amount of reading.
The 90-minute limit isn't tight if you're genuinely comfortable with the material. I finished with 18 minutes left. But if you're second-guessing yourself on networking and security, that time pressure adds up quickly.
What practice resources did you use? I've been through the official study guide but it feels thin on the scenario-type questions you're describing. Looking for something with more realistic question formats before I sit for it next month.
Congrats on passing. Networking wrecked me on my first attempt - I didn't fully understand how the IPAM driver worked and got 3 questions wrong on that topic alone. The second time I rebuilt a full overlay network from scratch in my lab and it clicked.
Agree on the Swarm point. The exam still covers it on paper but the real-world questions seem to favor containerization fundamentals over orchestration specifics. Kubernetes barely appears in the official domain breakdown.