15 Docker Interview Questions You Need to Know Before Your Next Interview

Docker questions come up in almost every DevOps and data engineering interview, and this video answers 15 of the most common ones the way you'd actually give them out loud: building, running, and cleaning up real containers on screen as we go, not just reading a list. Whether you're prepping for a data engineering, DevOps, or backend role, these are the 15 Docker interview questions that come up most, pulled from DataCamp's full list of 26 (link below for the rest, plus every code snippet). CHAPTERS 00:00 Intro 00:18 Docker Basics 01:28 Building & Running 02:50 Scaling & Reliability 04:02 Health & Cleanup 05:14 Kubernetes & Real World QUESTIONS COVERED, WITH TIMESTAMPS 00:20 What is a Docker image? 00:40 Docker client vs. daemon: what's the difference? 00:57 Bridge vs. overlay networking 01:30 How do you write a Dockerfile? 01:57 Docker Compose vs. a Dockerfile 02:18 Bind mounts vs. volumes 02:52 How do you autoscale Docker Swarm? 03:18 How do you scale a service with Compose? 03:39 Docker restart policies, explained 04:04 3 Docker security best practices 04:30 How do Docker health checks work? 04:52 What are dangling images, and how do you clean them up? 05:17 Docker vs. Kubernetes: what's the real difference? 05:31 How do you manage secrets in Docker and Kubernetes? 05:52 Scenario: migrating a WordPress container with zero data loss RESOURCES Full list of 26 Docker interview questions (with all the code): https://www.datacamp.com/blog/docker-interview-questions?utm_medium=organic_social&utm_source=youtube&utm_campaign=000000_1-docker-interview-questions_2-b2c_3-all_5-bl_8-ogsl-yt_10-bau Go deeper with the track: Containerization and Virtualization with Docker and Kubernetes https://www.datacamp.com/tracks/containerization-and-virtualization?utm_medium=organic_social&utm_source=youtube&utm_campaign=000000_1-docker-interview-questions_2-b2c_3-all_7-le_8-ogsl-yt_10-bau Want more hands-on interview prep like this? Subscribe for the next one. #Docker #DevOpsInterview #DataCamp