Docker Certified Associate Questions and Answers
200 questions organized by topic with detailed explanations
Mirantis
M-DCA
200 questions
6 topics
Updated May 2026Orchestration
50 questions13 easy22 medium15 hard~25% of exam
Image Creation, Management, and Registry
40 questions8 easy24 medium8 hard~20% of exam
A repository contains large test data that is never needed during container builds. Which file should be used to keep th...A company hosts a private registry at `registry.example.com:5000`. A developer built `myapp:2.1` locally and wants to pu...A build needs a temporary variable during image creation, but the final runtime container should not keep that value as ...
Installation and Configuration
30 questions8 easy16 medium6 hard~15% of exam
On a standard Linux Docker Engine installation, which path is the default location for the daemon configuration file?Why is adding a user to the Linux `docker` group considered security-sensitive?A host has many short-lived containers, and the operations team wants a default logging driver that helps reduce disk-ex...
Networking
30 questions8 easy17 medium5 hard~15% of exam
An operator wants to connect a standalone troubleshooting container to an existing overlay network for temporary diagnos...A replicated web service publishes port 443 with the default ingress mode. A client connects to a swarm node that is not...A developer creates a user-defined bridge network and attaches two containers to it. How can those containers resolve ea...
A team considers exposing the Docker daemon over unauthenticated plain HTTP on a TCP port for convenience. What does Doc...On a Linux swarm node, where is a secret mounted inside a service task by default?A security team wants a containerized helper process to run with the fewest privileges needed. Which capability strategy...
Storage and Volumes
20 questions8 easy8 medium4 hard~10% of exam
A container writes uploaded files into its writable layer and is then removed. What happens to that data if no volume or...A replicated service uses the local volume driver for application state on three different swarm nodes. Which statement ...Why does Docker recommend volumes over writing heavily into a container's writable layer for persistent application data...
All Questions
| # | Question | Topic | Difficulty |
|---|---|---|---|
| 1 | A team considers exposing the Docker daemon over unauthenticated plain HTTP on a TCP port for conven... | Security | medium |
| 2 | A new Linux host must join an existing swarm only as a worker. Which token should the administrator ... | Orchestration | medium |
| 3 | On a Linux swarm node, where is a secret mounted inside a service task by default? | Security | medium |
| 4 | A container writes uploaded files into its writable layer and is then removed. What happens to that ... | Storage and Volumes | easy |
| 5 | On a standard Linux Docker Engine installation, which path is the default location for the daemon co... | Installation and Configuration | easy |
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