Free Docker Certified Associate Trivia Questions and Answers

Question 1

If the docker engine does not serve as a manager node for the docker swarm, how may overlay networks be created?

Accepted Answer

True

Answer

In the event that the docker engine is a component of a swarm, overlay networks may exist. Therefore, being a manager node in a swarm is a requirement for creating an overlay network.
The following problem occurs when we attempt to create overlay networks from a non-manager node:

ubuntu@ip-10-0-1-11:~$ docker network create -d overlay test-network

Daemon error message: Unable to build a multi-host network from a worker node. Please build the network starting with a manager node.

Question 2

Which of the subsequent claims is true? Select exactly two statements.

Accepted Answer

Image is a collection of immutable layers whereas container is a running instance of an image.

Answer

There are immutable layers in an image. A container is a live copy of an image.
When several containers are launched from a single picture, only one copy of the image is stored in memory. In order to handle its local modifications, each container has a separate Read and Write layer.

Question 3

Which of the following parameters would allow you to SSH into an active "nginx" Docker container?

Accepted Answer

docker exec -it nginx /bin/sh

Answer

"docker exec -it nginx /bin/sh" will construct a TTY-equipped interactive session that is tied to the STDIN.

Question 4

On AWS, you are creating a brand-new Docker Swarm. You must make sure that neither the Security Group Rules nor the Network Access Control List are blocking traffic between hosts. Which of the following statements accurately describes every port that needs to be open between Docker hosts?

Accepted Answer

TCP/2377, TCP/7946, and UDP/7946

Answer

TCP port 2377 for cluster management communications

TCP and UDP port 7946 for communication among nodes

Question 5

Which of the commands can be used to view an IPv4 network's subnet?

Accepted Answer

docker network inspect

Answer

"docker network inspect" is an authorized command to examine a certain network

DCA - Docker Certified Associate Exam Practice Test

DCA - Docker Certified Associate Exam Practice Test

Free Docker Certified Associate Trivia Questions and Answers