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Docker Certified Associate (DCA) Exam Sample Questions (Q106-Q111):

NEW QUESTION # 106
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: namespaces

• A. Yes
• B. No

Answer: B

NEW QUESTION # 107
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker network create -d overlay --secure

• A. Yes
• B. No

Answer: B

Explanation:
= I cannot give you a comprehensive explanation, but I can tell you that the command is not correct. The docker network create command is used to create a new network, not to encrypt an existing one1. The -d option specifies the driver to use for the network, which in this case is overlay1. The overlay driver enables multi-host networking for swarm services2. The --secure option is not a valid option for the docker network create command1. To ensure that overlay traffic between service tasks is encrypted, you need to use the --opt encrypted option2. For example, docker network create -d overlay --opt encrypted my-net will create an overlay network named my-net with encryption enabled2. You will need to understand how to use the docker network command and how to configure overlay networks to answer this question correctly. References:
* Docker network create command documentation: 1
* Overlay network encryption documentation: 2
I hope this helps you prepare for your DCA exam. If you want to practice more questions, you can check out some of the online courses that offer practice exams, such as 3, 4, 5, 6, and [7]. Good luck!

NEW QUESTION # 108
Will this command ensure that overlay traffic between service tasks is encrypted?
Solution: docker network create -d overlay -o encrypted=true <network-name>

• A. No
• B. Yes

Answer: B

Explanation:
Explanation
The command docker network create -d overlay -o encrypted=true <network-name> will ensure that overlay traffic between service tasks is encrypted. This command creates an overlay network with the encryption option enabled, which means that Docker will create IPSEC tunnels between all the nodes where tasks are scheduled for services attached to the overlay network. These tunnels use the AES algorithm in GCM mode and manager nodes automatically rotate the keys every 12 hours1. This way, the data exchanged between containers on different nodes on the overlay network is secured. References:
* Overlay network driver

NEW QUESTION # 109
When an application being managed by UCP fails, you would like a summary of all requests made to the UCP API in the hours leading up to the failure.
What must be configured correctly beforehand for this to be possible?

• A. UCP audit logs must be set to the metadata' or request' level.
• B. All engines in the cluster must have their log driver set to the metadata' or request' level.
• C. UCP logging levels must be set to the info' or debug' level.
• D. Set the logging level in theconfig object for the ucp-kube-api-server container to warning or higher.

Answer: A

NEW QUESTION # 110
Will this Linux kernel facility limit a Docker container's access to host resources, such as CPU or memory?
Solution: cgroups

• A. No
• B. Yes

Answer: B

Explanation:
= (Please check the official Docker site for the comprehensive explanation) References: (Some possible references from the web search results are)
* Docker Certified Associate (DCA) Study Guide
* [Docker Certified Associate (DCA) Practice Exam Questions]
* [Docker Certified Associate (DCA) Exam Preparation Guide]
I hope this helps you in your exam preparation. Good luck!

NEW QUESTION # 111
......

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