Docker Certified Associate Practice Tests: 10 Practice Tests and 550 Questions
DCA
550
Orchestration | Swarm setup, managers and workers, Raft quorum, services vs containers, stacks with docker stack deploy, scaling, replicated and global services, node labels and placement, service templates, rolling updates and troubleshooting, plus Kubernetes pods, deployments, ConfigMaps and Secrets (25%)
Image Creation, Management, and Registry | Dockerfile instructions, efficient and multi-stage builds with BuildKit, tagging, inspecting and pruning images, layers, deploying and using a registry, pushing, pulling, searching and signing images (20%)
Installation and Configuration | Sizing, repositories and engine installation, storage driver selection, logging drivers, daemon configuration and start on boot, namespaces and cgroups, certificate-based client and registry authentication, swarm and UCP/DTR (MKE/MSR) setup and backups (15%)
Networking | Container Network Model, bridge, overlay, host, macvlan and ingress drivers, publishing ports, host vs ingress mode, external DNS, overlay service networking, troubleshooting connectivity, and Kubernetes ClusterIP and NodePort services (15%)
Security | Default engine and swarm security, mutual TLS, Docker Content Trust and image signing, image scanning, UCP RBAC, teams and grants, LDAP/AD integration, client bundles and external certificates (15%)
Storage and Volumes | Storage drivers per OS (overlay2 today, devicemapper legacy), image layers on disk, volumes and bind mounts, object vs block storage, cleaning up unused images, storage across cluster nodes, and Kubernetes PersistentVolumes, claims, StorageClasses and CSI (10%)
Image Creation, Management, and Registry
A production service must always run exactly the same image bytes that passed testing, even if someone later pushes a new image under the same tag. How should the image be referenced in the service definition?
By the latest tag
By a tag that includes today's date
By its content digest, for example myrepo/api@sha256: followed by the digest
By the image ID shown in docker image ls on the build machine
C
A digest is the SHA-256 of the image manifest, so a reference by digest is immutable: the registry can only return content that matches it. Tags, including latest and date tags, are mutable pointers that a later push can move, and a local image ID cannot be used to pull from a registry.
https://exametics.com/product/docker-certified-associate-practice-tests/
Course Content
Docker Certified Associate (DCA) – Practice Test #1
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Docker Certified Associate (DCA) – Practice Test #2
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Docker Certified Associate (DCA) – Practice Test #3
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Docker Certified Associate (DCA) – Practice Test #4
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Docker Certified Associate (DCA) – Practice Test #5
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Exam Mode: Docker Certified Associate (DCA) – Practice Test #6
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Docker Certified Associate (DCA) – Practice Test #7
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Docker Certified Associate (DCA) – Practice Test #8
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Docker Certified Associate (DCA) – Practice Test #9
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Docker Certified Associate (DCA) – Practice Test #10
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