Docker Certified Associate (DCA)

DCA · ● Active · Associate · Docker / Mirantis

Exam facts

Field	Value
Cost	$195–$199 USD
Duration	90 minutes
Questions	~55–60 (13 MC + 42 DOMC)
Passing Score	55–65% (Docker does not publish official score)
Format	Multiple choice + Discrete Option Multiple Choice (DOMC)
Delivery	Online proctored (Examity)
Languages	English
Valid for	2 years
Renewal	Retake exam
Prerequisites	None formal; 6–12 months hands-on Docker experience recommended

About

The Docker Certified Associate (DCA) is the primary vendor certification for Docker containerization. Administered by Mirantis (which acquired Docker's Enterprise platform business in November 2019), the DCA validates practical competency with Docker Engine, container orchestration, networking, security, and enterprise containerization practices.

The certification is designed by experienced Docker practitioners using real-world scenarios and is actively maintained and offered through the Mirantis Training platform. It is recognized within the DevOps and cloud-native communities as a marker of containerization expertise.

Domain context — DevOps / Containers

Docker is the foundational container platform that transformed software deployment and infrastructure management. DevOps and container engineers rely on Docker for:

Standardized application packaging — Bundling applications with dependencies into portable images
Infrastructure abstraction — Running containers consistently across development, testing, and production
Rapid scaling — Quick container startup and orchestration for distributed systems
Microservices enablement — Breaking monolithic applications into manageable, independently deployable services
CI/CD integration — Automating build, test, and deployment pipelines
Security isolation — Lightweight process isolation with configurable security policies

The DCA certification bridges the gap between basic Docker knowledge and production-ready containerization skills, emphasizing enterprise scenarios, multi-host orchestration, and operational best practices.

Topics covered

The DCA exam covers seven primary domains:

1. Installation & Configuration

Docker Engine installation on Linux, Windows, and cloud platforms
Daemon configuration, logging, and runtime options
Network configuration (bridge, overlay, host modes)
Storage driver selection and optimization

2. Image Creation & Management

Writing efficient Dockerfiles with layers, caching, and multi-stage builds
Creating images from containers and registries
Image tagging, versioning, and vulnerability scanning
Private registry setup and image distribution

3. Container Deployment & Orchestration

Running and managing containers (lifecycle, resource limits, restart policies)
Docker Swarm (modes, services, node management, scheduling)
Rolling updates and service failover
Health checks and monitoring

4. Networking

Container-to-container communication
Service discovery and load balancing
Network types (bridge, overlay, macvlan, host)
DNS and ingress networking in Swarm

5. Storage & Volumes

Volume types (named, bind mounts, tmpfs)
Persistent data management for stateful containers
Storage drivers and performance optimization
Backup and recovery strategies

6. Security

User namespaces and privilege escalation prevention
Secrets management (Docker Secrets in Swarm)
TLS/mTLS for container communication
Image scanning and vulnerability mitigation
RBAC and access control

7. Docker Enterprise / Desktop Features (deprecated concepts)

Docker Desktop features (though Docker Desktop is now community-focused)
Historical context on Docker Enterprise components

Note: Mirantis transitioned Docker Enterprise to a Kubernetes-based platform after 2019. Modern DCA exams de-emphasize Docker Enterprise features in favor of core Docker and Swarm competencies.

Common job-ready skills

Passing the DCA demonstrates:

Ability to design, build, and optimize Docker images for production use
Proficiency managing multi-container applications with Docker Compose and Swarm
Hands-on security hardening of containerized environments
Troubleshooting container failures, networking issues, and performance bottlenecks
Implementing CI/CD pipelines with containerized workloads
Managing persistent data and stateful services in containers
Operating and scaling container orchestration platforms at scale
Integrating Docker with DevOps toolchains (Jenkins, GitLab, Kubernetes)

Recommended courses

Official & Instructor-Led:

Self-Paced Online:

Udemy: "Docker Certified Associate (DCA) Exam Prep" (multiple providers available)
Linux Academy / A Cloud Guru Docker Swarm and Compose modules
KodeKloud DCA preparation course
Simplilearn Docker Certified Associate training

Hands-On Labs:

Play with Docker (online sandbox): https://www.play-with-docker.com/
Docker documentation and tutorials: https://docs.docker.com/
Practice environments on Katacoda or similar platforms

Practice exams

Recommendation: Complete 3–5 practice tests and consistently score 75–85%+ before scheduling the official exam.

Books

Docker Deep Dive by Nigel Poulton — Comprehensive guide to Docker architecture, images, containers, and Swarm
The Docker Book by James Turnbull — Practical introduction and reference for Docker operations
Docker in Action by Jeff Nickoloff & Stephen Kuenzli — Real-world examples and patterns
Kubernetes in Action by Marko Lukša — While focused on Kubernetes, provides context for container orchestration (useful background)
Mirantis Documentation & Study Guides — Official exam preparation materials available through Mirantis Training

Job titles

Professionals with DCA certification typically pursue or hold these roles:

DevOps Engineer — Design and maintain containerized infrastructure and CI/CD pipelines
Container Engineer — Specialize in Docker and container platform operations
Platform Engineer — Build and scale internal container platforms and developer self-service
Site Reliability Engineer (SRE) — Ensure reliability and performance of containerized services
Cloud Engineer — Deploy containerized workloads on AWS, Azure, or GCP
Infrastructure Engineer — Manage container orchestration and enterprise infrastructure
Solutions Architect — Design containerized solutions for enterprise clients

Salary (estimated)

United States:

$110,000–$145,000 USD annually (mid-career DevOps Engineer with Docker expertise)
Senior roles: $140,000–$180,000+

Conversions (approximate, 2026 rates):

South Africa: R1,980,000–R2,610,000 ZAR (× ~18 to USD)
United Kingdom: £85,000–£112,000 GBP
European Union: €100,000–€135,000 EUR
Australia: AUD $165,000–$220,000

Note: Salary varies by location, company size, experience level, and additional certifications (CKA, AWS, GCP).

Skills validated

The DCA certification validates:

Container fundamentals — Understanding image layers, registries, and lifecycle
Docker Engine operations — Installation, configuration, daemon management
Docker Swarm orchestration — Service scheduling, rolling updates, failover
Networking & service discovery — Multi-host communication, DNS, load balancing
Storage management — Volumes, drivers, persistent data strategies
Security hardening — Secrets, user namespaces, TLS, vulnerability scanning
Troubleshooting & debugging — Logs, resource monitoring, failure diagnosis
Enterprise best practices — Production deployment patterns, scaling, high availability

Related certifications

Certified Kubernetes Administrator (CKA) — Kubernetes alternative; broader industry adoption post-2020
Certified Kubernetes Application Developer (CKAD) — Developer-focused Kubernetes certification
AWS Certified DevOps Engineer — AWS-specific DevOps and containerization
Red Hat Certified System Administrator (RHCSA) — Linux foundation for container operators
Red Hat Certified Specialist in Container Technology — Red Hat-flavored container expertise
HashiCorp Certified: Terraform Associate — Infrastructure-as-code complementary cert
LF Certified Kubernetes Security Specialist (CKS) — Kubernetes security focus

Note: While DCA validates Docker Swarm, most organizations have adopted Kubernetes for orchestration. Many professionals pursue CKA after or alongside DCA.

Sources

Last verified: 2026-05-02 via Mirantis Training and official certification platforms.