DockerAssociate2026 Updated

Docker Certified Associate

Updated May 1, 202612 min readWritten by Certsqill experts

Quick facts — DCA

Exam cost

$195

Questions

55 multiple-choice and scenario questions

Time limit

90 minutes

Passing score

70%

Valid for

2 years

Testing

Mirantis / PSI Online Proctoring

Who this exam is for

The Docker Certified Associate certification is designed for professionals who work with or want to work with Docker technologies in a professional capacity. It is taken by cloud engineers, DevOps practitioners, IT administrators, and technical professionals looking to validate their expertise.

You do not need extensive prior experience to attempt it, but you will benefit from hands-on familiarity with the subject matter. The exam tests applied knowledge and architectural judgment, not just memorization. If you can reason about trade-offs and real-world scenarios, structured practice will handle the rest.

Domain breakdown

The DCA exam is built around official domains, each with a fixed percentage of the question pool. This distribution should directly inform how you allocate your study time.

Domain

Weight

Focus areas

Orchestration

25%

Covers Docker Swarm, services, stacks, and container scheduling.

Image Creation, Management & Registry

20%

Tests Dockerfile best practices, multi-stage builds, and registry operations.

Installation & Configuration

15%

Focuses on Docker Engine install, daemon configuration, and namespaces.

Networking

15%

Covers bridge, overlay, and host networks, plus service discovery.

Security

15%

Tests image scanning, secrets, content trust, and user namespaces.

Storage & Volumes

10%

Covers named volumes, bind mounts, and storage drivers.

Note the domain with the highest weight — many candidates under-invest here because it feels conceptual. In practice, this is where the exam is most precise, with scenario-based questions that test specifics.

What the exam actually tests

This is not a memorization exam. Questions require applied judgment under constraints. Almost every question includes a scenario with explicit requirements and asks you to select the most appropriate solution.

Here are examples of the question types you will encounter:

Swarm Orchestration

"How do you scale a service named web to 5 replicas in a Swarm cluster?"

Know docker service scale and docker service update --replicas commands.

Image & Registry

"Write a multi-stage Dockerfile that builds a Go binary and copies it to a scratch image."

Multi-stage builds are frequently tested; understand COPY --from syntax.

Networking Scenario

"Two containers on separate hosts need to communicate — which network driver enables this?"

Overlay networks require Swarm mode; know when to use each driver.

How to prepare — 4-week study plan

This plan assumes one hour per weekday and roughly 30 minutes of lighter review on weekends. It is calibrated for someone with some relevant experience. If you are starting from zero, add an extra week before Week 1 to familiarise yourself with the basics.

Week 1: Installation & Image Fundamentals

Install Docker Engine on Linux
Write multi-stage Dockerfiles
Push and pull from Docker Hub
Explore image layers with docker history

Week 2: Networking & Storage

Create bridge and overlay networks
Configure DNS-based service discovery
Use named volumes and bind mounts
Compare storage driver options

Week 3: Swarm Orchestration

Init a Swarm and add worker nodes
Deploy stacks with docker stack deploy
Scale and update services
Configure service placement constraints

Week 4: Security & Mock Exams

Enable Docker Content Trust
Manage Swarm secrets
Scan images with docker scan
Complete three mock exams under time

Common mistakes candidates make

These patterns appear repeatedly among candidates who resit this exam. Knowing them in advance is worth several percentage points.

Confusing Swarm and Compose concepts

Docker Compose is for local development; Swarm stacks are production orchestration. Know which commands apply to each.

Overlooking overlay network requirements

Overlay networks only work in Swarm mode. Trying to create one without an active Swarm returns an error.

Forgetting EXPOSE vs -p

EXPOSE in a Dockerfile is documentation only; actual port publishing requires -p or --publish at runtime.

Misunderstanding volume vs bind mount persistence

Named volumes are managed by Docker and persist container removal; bind mounts depend on the host path.

Is Certsqill right for you?

Honestly: Certsqill is built for candidates who have already done some studying and want to convert knowledge into exam performance. If you have never touched the subject, start with a foundational course first — then come to Certsqill when you are ready to practice.

Where Certsqill is strong: question depth, AI-powered explanations, and domain analytics. Every question is mapped to the exam blueprint. When you get something wrong, the AI tutor explains why the right answer is right and why each wrong answer fails under the specific constraints in the question.

Where Certsqill is not a replacement: video courses and hands-on labs. Use Certsqill to test and sharpen — not as your first exposure to a topic you have never encountered.

Ready to start practicing?

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