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Docker Certified Associate (DCA) certification exam is a valuable credential for IT professionals and developers who work with Docker technologies. It validates their knowledge and skills in using Docker to build, ship, and run containerized applications. Docker Certified Associate (DCA) Exam certification can help professionals to enhance their career prospects and to demonstrate their expertise in Docker technologies to potential employers.

To earn the DCA Certification, candidates must pass a 55-question, multiple-choice exam that covers a broad range of topics, including Docker architecture, Docker installation and configuration, Docker networking, Docker images and repositories, Docker security, and Docker orchestration. DCA exam is designed to test the candidate's practical knowledge of Docker, rather than just their ability to memorize facts and figures.

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Docker Certified Associate (DCA) exam is an industry-recognized certification that validates an individual’s knowledge and skills in managing and deploying Docker containers. DCA Exam covers a wide range of topics related to Docker and its related technologies, including container networking, image creation and management, container orchestration, and security. Docker Certified Associate (DCA) Exam certification is highly valued in the industry and can lead to higher salaries and promotions. Candidates can prepare for the exam by taking advantage of Docker’s training courses and resources or by using third-party study materials.

Docker Certified Associate (DCA) Exam Sample Questions (Q176-Q181):

NEW QUESTION # 176
A server is running low on disk space. What command can be used to check the disk usage of images, containers, and volumes for Docker engine?

A. 'docker system df'
B. 'docker system free'
C. 'docker system prune'
D. 'docker system ps'

Answer: A

NEW QUESTION # 177
Does this command create a swarm service that only listens on port 53 using the UDP protocol?
Solution: 'docker service create --name dns-cache -p 53:53/udp dns-cache'

A. No
B. Yes

Answer: B

NEW QUESTION # 178
Can this set of commands identify the published port(s) for a container?
Solution. 'docker port inspect", docker container inspect"

A. Yes
B. No

Answer: B

Explanation:
The set of commands docker port inspect and docker container inspect will not identify the published port(s) for a container. The reason is that there is no such command as docker port inspect. The correct command to inspect the port mappings of a container is docker port1. The command docker container inspect can also show the port mappings of a container, but it will display a lot of other information as well, so it is not as concise as docker port2. To identify the published port(s) for a container, you can use either of these commands:
* docker port CONTAINER will list all the port mappings of the container1.
* docker port CONTAINER PRIVATE_PORT will list only the port mapping of the specified private port of the container1.
* docker container inspect --format=' { {.NetworkSettings.Ports}}' CONTAINER will list only the port
* mappings of the container in a JSON format23.
For example, if you have a container named web that publishes port 80 to port 8080 on the host, you can use any of these commands to identify the published port:
$ docker port web
80/tcp -> 0.0.0.0:8080
$ docker port web 80
0.0.0.0:8080
$ docker container inspect --format=' { {.NetworkSettings.Ports}}' web
map[80/tcp:[map[HostIp:0.0.0.0 HostPort:8080]]]
References:
* docker port
* docker container inspect
* How can I grab exposed port from inspecting docker container?

NEW QUESTION # 179
Which networking drivers allow you to enable multi-host network connectivity between containers?

A. bridge, macvlan, ipvlan, overlay
B. bridge, user-defined, host
C. host, macvlan, overlay, user-defined
D. macvlan, ipvlan, and overlay

Answer: A

Explanation:
The networking drivers that allow you to enable multi-host network connectivity between containers are bridge, macvlan, ipvlan, and overlay. These drivers create networks that can span multiple Docker hosts, and therefore enable containers on different hosts to communicate with each other. The other drivers, such as host, user-defined, and none, create networks that are either isolated or limited to a single host. Here is a brief overview of each driver and how it supports multi-host networking:
* bridge: The bridge driver creates a network that connects containers on the same host using a Linux bridge. However, it can also be used to create a network that connects containers across multiple hosts using an external key-value store, such as Consul, Etcd, or ZooKeeper. This feature is deprecated and not recommended, as it requires manual configuration and has some limitations. The preferred driver for multi-host networking is overlay1.
* macvlan: The macvlan driver creates a network that assigns a MAC address to each container, making it appear as a physical device on the network. This allows the containers to communicate with other devices on the same network, regardless of the host they are running on. The macvlan driver can also use 802.1q trunking to create sub-interfaces and isolate traffic between different networks2.
* ipvlan: The ipvlan driver creates a network that assigns an IP address to each container, making it appear as a logical device on the network. This allows the containers to communicate with other devices on the same network, regardless of the host they are running on. The ipvlan driver can also use different modes, such as l2, l3, or l3s, to control the routing and isolation of traffic between different networks3.
* overlay: The overlay driver creates a network that connects multiple Docker daemons together using VXLAN tunnels. This allows the containers to communicate across different hosts, even if they are on different networks. The overlay driver also supports encryption, load balancing, and servicediscovery. The overlay driver is the default and recommended driver for multi-host networking, especially for Swarm services4.
Reference:
* Use bridge networks
* Use macvlan networks
* Use ipvlan networks
* Use overlay networks

NEW QUESTION # 180
Is this a function of UCP?
Solution: scans images to detect any security vulnerability

A. No
B. Yes

Answer: B

Explanation:
= Scanning images to detect any security vulnerability is a function of UCP. UCP integrates with Docker Trusted Registry (DTR), which is a secure and scalable image storage solution1. DTR has a built-in image scanning feature that checks every layer of every image for known vulnerabilities and displays the results in the UCP web UI2. This helps users to identify and fix any security issues before deploying their applications. UCP also allows users to enforce security policies and only allow running applications that use images that are scanned and free of vulnerabilities3. Reference:
Docker Trusted Registry | Docker Docs
Scan images for vulnerabilities | Docker Docs
Manage images | Docker Docs

NEW QUESTION # 181
......

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Valid DCA Test Voucher | DCA Valid Dumps Files

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Docker Certified Associate (DCA) Exam Sample Questions (Q176-Q181):

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