DCA Containers Practice Questions
The free DCA: Docker Certified Associate questions that deal with containers, with answers and explanations. The full bank and the timed practice test cover every topic the exam asks about.
Question #2
You want to ensure that your Docker containers are running only on certain nodes in your cluster. What could you use to achieve this?
Correct answer: C
Explanation
Node selectors allow you to specify criteria for which nodes your containers can run on.
Question #4
When using Docker Compose, which command initializes & starts containers in the background?
Correct answer: A
Explanation
The command 'docker compose up' initializes and starts the containers defined in the docker-compose.yml file.
Question #7
How do you ensure that your containers can communicate with each other in different services defined by Docker Compose?
Correct answer: D
Explanation
Docker Compose automatically creates a network that allows containers to communicate with each other via service names.
Question #8
Which command would you run to see all running containers in your Docker instance?
Correct answer: C
Explanation
The command 'docker ps' lists all currently running containers.
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