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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Networking | 15% | - Expose ports, publish services, and manage DNS - Secure and troubleshoot container networking - Understand bridge, overlay, and macvlan networks |
| Topic 2: Storage | 10% | - Use volumes, bind mounts, and tmpfs - Backup, restore, and migrate data - Configure persistent storage and data management |
| Topic 3: Security | 15% | - Scan images for vulnerabilities - Apply security profiles and capabilities - Manage user access and roles - Secure daemon and API communication |
| Topic 4: Images and Registry | 20% | - Manage image layers, tagging, and versioning - Sign and verify images with Docker Content Trust - Work with Docker Hub and private registries - Write efficient Dockerfiles, multi-stage builds |
| Topic 5: Installation and Configuration | 15% | - Set up Docker Enterprise components - Install Docker Engine on Linux, Windows, and macOS - Configure daemon options, logging, and storage drivers |
| Topic 6: Orchestration | 25% | - Deploy and manage Swarm clusters - Perform rolling updates and rollbacks - Create and manage services, stacks, secrets, and configurations |
The DCA Practice Questions are designed and verified by experienced and renowned Docker Certified Associate (DCA) Exam exam trainers. They work collectively and strive hard to ensure the top quality of Braindumpsqa DCA exam practice questions all the time. The DCA Exam Questions are real, updated, and error-free that helps you in Docker Certified Associate (DCA) Exam exam preparation and boost your confidence to crack the upcoming DCA exam easily.
NEW QUESTION # 55
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups
Answer: A
Explanation:
Docker uses cgroups, a Linux kernel feature, to limit the resources a container can use. This includes CPU and memory resources12. For instance, Docker can limit a container's CPU usage to the equivalent of a single CPU core on the Docker host system2. Similarly, Docker can limit a container's memory usage1. However, to use these features, the Docker host must have cgroup memory and swap accounting enabled1. Therefore, cgroups can indeed limit a Docker container's access to host resources such as CPU and memory12.
NEW QUESTION # 56
Is this an advantage of multi-stage builds?
Solution: optimizes Images by copying artifacts selectively from previous stages
Answer: A
Explanation:
Multi-stage builds are a feature of Docker that allows you to use multiple FROM statements in your Dockerfile. Each FROM statement creates a new stage of the build, which can use a different base image and run different commands. You can then copy artifacts from one stage to another, leaving behind everything you don't want in the final image. This optimizes the image size and reduces the attack surface by removing unnecessary dependencies and tools. For example, you can use a stage to compile your code, and then copy only the executable file to the final stage, which can use a minimal base image like scratch. This way, you don't need to include the compiler or the source code in the final image. References:
* Multi-stage builds | Docker Docs
* What Are Multi-Stage Docker Builds? - How-To Geek
* Multi-stage | Docker Docs
NEW QUESTION # 57
You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?
Solution: Mount the configuration file directly into the appropriate pod and container using the .spec.containers.configMounts key.
Answer: B
NEW QUESTION # 58
The Kubernetes yaml shown below describes a networkPolicy.
Will the networkPolicy BLOCK this trafftc?
Solution. a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label
Answer: A
Explanation:
The networkPolicy will block the traffic from a pod bearing the tier: backend label, to a pod bearing the tier:
frontend label. The networkPolicy specifies that only pods with the tier: frontend label can access the pods with the app: guestbook-api and tier: backend labels on port 801. Any other traffic to the backend pods will be denied by default2. Therefore, a request issued from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label will be blocked by the networkPolicy. References: Connect a Frontend to a Backend Using Services), Network Policies)
NEW QUESTION # 59
Which of the following namespaces is disabled by default and must be enabled at Docker engine runtime in order to be used?
Answer: D
NEW QUESTION # 60
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