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Topics of Docker Certified Associate Exam
Candidates should apprehend the examination topics before they begin of preparation. Our DCA dumps will include the following topics:
Lesson 01 - Introduction
- Containerization And Virtualization
- Docker Ecosystem
- Docker Architecture Engine And Objects
- Understanding Docker Overview
- Docker Architecture InAction
- Images And Containers
- Docker Architecture Container Format
Lesson 02 - Understanding Docker
- Deleting Containers
- Installation: CentOS
- End of Module
- Working with Containers Hostnames
- Docker On Linux Platform
- List,Start, Stop Restart Containers
- Multiple Containers
- Installation: continued
- Containers on Filesystem
- Deploy, Login, Exit Container
- Stats Inspect
Lesson 03 - Docker CE on Linux Platform
- Container Networking
- Bridge Network
- Docker Networking
- Disconnect And Add Network
- Introduction to Overlay Network
- None Network
- Multiple Networks In Container
- Remove Networks
- Host Network
- Create New Networks
- Exercise: Use Custom Networks
Lesson 04 - Docker Networking
- Build Image using Commit
- Docker Storage and Volumes
- Docker Volumes
- Docker Storage Drivers
- Build Image using Dockerfile
- Docker Images CLI Commands
- Docker file Instructions
- Persistent Storage
- Search and Pull Images from Docker Hub
- Manage Application Data
- Selecting Storage Driver
- Push Images to Docker Hub
- Docker Bind Mounts
- Docker Images
- External Storage
- Lesson 05 - Docker Images
- Docker Images CLI Commands: Contd
- Docker Images: Recap
- Docker tmpfs Mounts
Lesson 06 - Docker Storage and Volumes
- Compose Installation
- Compose Lab
- Docker Compose
- Case for Docker Compose
Lesson 07 - Docker Compose
- Managing Swarm Services
- Docker Swarm
- Deploy Services to Swarm
- Updates to Services
- Maintain Swarm
- Docker Stack
- Create Swarm
- Secrets and Overlay Network
- Concepts of Swarm
Lesson 08 - Orchestration Docker Swarm
- Access Control
- Introduction to UCP
- Client Certificate Bundles
- External Certificates
- Universal Control Plane
- Deploy, Manage, and Monitor UCP
- LDAP with UCP
Lesson 09 - Universal Control Plane
- Miscellaneous Topic with DTR
- Docker Trusted Registry
- Introduction Deploy DTR
- Backup Swarm UCP DTR
Lesson 10 - Docker Trusted Registry
- Docker Content Trust
- Logs and Logging Drivers
- Security Scanning
- Docker Security Logs
- Security With MTLS
NEW QUESTION 46
Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.
Is this a way to accomplish this?
Solution: Create one pod and add all the resources needed for each application
- A. No
- B. Yes
Answer: A
NEW QUESTION 47
A users attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation?
Solution: inter-process communication
- A. No
- B. Yes
Answer: A
NEW QUESTION 48
Which of the following is true about overlay networks?
- A. Overlay networks are only created on the manager nodes.
- B. Overlay networks are first created on the manager nodes. Then they are created on the
worker nodes once a task is scheduled on the specific worker node. - C. Overlay networks are created only on the manager node that you created the overlay
networking on - D. Overlay networks are created on all cluster nodes when you create the overlay network.
Answer: D
NEW QUESTION 49
You are running only Kubernetes workloads on a worker node that requires maintenance, such as installing patches or an OS upgrade
Which command must be run on the node to gracefully terminate all pods on the node, while marking the node as unschedulable?
- A. 'kubectl drain <node name>'
- B. 'kubectl cordon <node name>'
- C. 'docker node update --availability drain <node name>'
- D. 'docker swarm leave'
Answer: B
NEW QUESTION 50
An application image runs in multiple environments, with each environment using different certificates and ports.
Is this a way to provision configuration to containers at runtime?
Solution: Provision a Docker config object for each environment.
- A. No
- B. Yes
Answer: B
NEW QUESTION 51
You want to create a container that is reachable from its host's network. Does this action accomplish this?
Solution: Use --link to access the container on the bridge network.
- A. No
- B. Yes
Answer: A
NEW QUESTION 52
Which of the following is NOT backed up when performing a Docker Trusted backup operation?
- A. Image blobs
- B. Repository metadata
- C. Access control to repos and images
- D. DTR configurations
Answer: A
NEW QUESTION 53
What is the difference between the ADD and COPY dockerfile instructions? (choosen 2)
- A. COPY supports compression format handling while ADD does not.
- B. ADD supports regular expression handling while COPY does not.
- C. ADD support remote URL handling while COPY does not.
- D. COPY supports regular expression handling while ADD does not.
- E. ADD supports compression format handling while COPY does not.
Answer: C
NEW QUESTION 54
You created a new service named 'http' and discover it is not registering as healthy. Will this command enable you to view the list of historical tasks for this service?
Solution: 'docker inspect http'
- A. No
- B. Yes
Answer: A
NEW QUESTION 55
Will this configuration achieve fault tolerance for managers in a swarm?
Solution: an odd number of manager nodes, totaling more than two
- A. No
- B. Yes
Answer: B
NEW QUESTION 56
Does this command display all the pods in the cluster that are labeled as 'env: development'?
Solution: 'kubectl get pods -I env=development'
- A. No
- B. Yes
Answer: B
NEW QUESTION 57
Which statement is correct about cluster management in Docker Enterprise Edition 3.x?
- A. Clusters can contain Windows 10 and Windows Server 2016 only.
- B. Clusters can contain Linux, Windows Server 2016 and 2019, and Linux on IBM z Systems.
- C. Clusters can contain Linux only.
- D. Clusters can contain Linux and Windows Server 2008 R2 only.
Answer: A
NEW QUESTION 58
You have deployed a service to swarm. Which command uses the Docker CLI to set the number of tasks of the services to 5? (choose 2)
- A. 'docker service replicas <service-id>=5'
- B. 'docker update service <service-id>=5'
- C. 'docker service scale <service-id> = 5''
- D. 'docker replica update <service-id>=5'
- E. 'docker service update --replicas=5 <service-id>'
Answer: C,E
NEW QUESTION 59
What is used by the kernel to Isolate resources when running Docker containers?
- A. Overlay networks
- B. Volumes
- C. Control groups (also know as cgroups)
- D. Namespaces
Answer: C
NEW QUESTION 60
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 3-3-1
- A. No
- B. Yes
Answer: A
NEW QUESTION 61
Is this an advantage of multi-stage builds?
Solution: better caching when building Docker images
- A. No
- B. Yes
Answer: A
NEW QUESTION 62
In Docker Trusted Registry, how would a user prevent an image, for example 'nginx:latest' from being overwritten by another user with push access to the repository?
- A. Use the DTR web UI to make the tag immutable.
- B. Tag the image with 'nginx:immutable'
- C. Keep a backup copy of the image on another repository.
- D. Remove push access from all other users.
Answer: A
NEW QUESTION 63
Will this command display a list of volumes for a specific container?
Solution: docker container logs nginx --volumes'
- A. No
- B. Yes
Answer: A
NEW QUESTION 64
Which command interactively monitors all container activity in the Docker engine?
- A. docker system events
- B. docker container logs
- C. docker system logs
- D. docker container events
Answer: A
NEW QUESTION 65
You configure a local Docker engine to enforce content trust by setting the environment variable
DOCKER_CONTENT_TRUST=1.
If myorg/myimage: 1.0 is unsigned, does Docker block this command?
Solution: docker service create myorg/myimage:1.0
- A. No
- B. Yes
Answer: A
NEW QUESTION 66
Are these conditions sufficient for Kubernetes to dynamically provision a persistentVolume, assuming there are no limitations on the amount and type of available external storage?
Solution: A default provisioner is specified, and subsequently a persistentVolumeClaim is created.
- A. No
- B. Yes
Answer: A
NEW QUESTION 67
A docker service 'web' is running with a scale factor of 1 (replicas = 1).
Bob intends to use the command 'docker service update --replicas=3 web'.
Alice intends to use the command 'docker service scale web=3'.
How do the outcomes oft these two commands differ?
- A. Bob's command only updates the service definition, but no new replicas are started. Alice's command
results in the actual scaling up of the 'web' service. - B. Bob's command updates the number of replicas of the 'web' service to 3. Alice's command results in an error.
- C. Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.
- D. Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances of the 'web' service.
Answer: D
NEW QUESTION 68
Can this set of commands identify the published port(s) for a container?
Solution: docker container inspect', 'docker port'
- A. No
- B. Yes
Answer: B
NEW QUESTION 69
From a DevOps process standpoint, it is best practice to keep changes to an application in version control. Which of the following will allow changes to a docker Image to be stored in a version control system?
- A. docker commit
- B. A dockerfile
- C. docker save
- D. A docker-compose.yml file
Answer: A
NEW QUESTION 70
Which one of the following commands will result in the volume being removed automatically once the container has exited?
- A. 'docker run --rm -v /foo busybox'
- B. 'docker run --del -v /foo busybox'
- C. 'docker run --read-only -v /foo busybox'
- D. 'docker run --remove -v /foo busybox'
Answer: A
NEW QUESTION 71
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