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Question No 1:
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 prune' C. 'docker system free' D. 'docker system ps'
Answer: A
Question No 2:
Which of the following are types of namespaces used by Docker to provide isolation? (Choose 2.)
A. Host B. Network C. Process ID D. Authentication E. Storage
Answer: B C
Question No 3:
Which of the following namespaces is disabled by default and must be enabled at Docker engine runtime in order to be used?
A. user B. pid C. net D. mnt
Answer: A
Question No 4:
Which of the following statements is true about secrets?
A. Secrets can be created from any node in the cluster. B. Secrets can be modified after they are created. C. Secret are stored unencrypted on manager nodes. D. Secrets can be created using standard input (STDIN) and a file.
Answer: D
Question No 5:
Following the principle of least privilege, which of the following methods can be used to securely grnt access to the specific user to communicate to a Docker engine? (Choose two.)
A. Utilize the '--host 0.0.0.0:2375' option to the Docker daemon to listen on port 2375 over TCP on all interfaces B. Utilize openssl to create TLS client and server certificates, configuring the Docker engine to use with mutual TLS over TCP. C. Utilize the '--host 127.0.0.1:2375' option to the Docker daemon to listen on port 2375 over TCP on localhost D. Give the user root access to the server to allow them to run Docker commands as root.
E. Add the user to the 'docker' group on the server or specify the grouè with the '--group' Docker daemon option.
Answer: B E
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