Container Troubleshooting Quiz

What you'll be asked

1. Which command is most effective for viewing the standard output and error logs of a container that is currently running in the background?
2. A containerized application is failing to connect to a database running on the host machine using 'localhost'. What is the most likely reason?
3. You observe that a container is restarting repeatedly (CrashLoopBackOff). Which command should you run to check the container's exit code and recent state changes?
4. Your application container is running, but the database connection is timing out. You want to verify if the database port is actually reachable from within the container. Which approach is best?
5. An application container crashes only when under heavy load, and 'docker logs' shows an 'OOMKilled' status. What is the most likely cause?

Answers and explanations come after you submit.