Free Access Docker.DCA.v2023-07-08.q66 Practice Test (Page 14)

Question 61

A user is having problems running Docker. Which of the following will start Docker in debug mode?

A.Set the debug key to true in the 'daemon.json' file.

B.Start the 'dockerd' process manually with the '--raw-logs' flag set to debug

C.Start the 'dockerd' process manually with the '--logging' flag set to debug

D.Set the logging key to debug in the 'daemon.json' file.

Question 62

What behavior is expected when a service is created with the following command:
'docker service create --publish 8000:80 nginx'

A.Only a single node in the cluster will listen on port 8080 and forward to port 80 in the container.

B.Only a single node in the cluster will listen on port 80 and forward to port 8080 in the container.

C.All nodes in the cluster will listen on port 8080 and forward to port 80 in the container.

D.All nodes in the cluster will listen on port 80 and forward to port 8080 in the container.

Question 63

Is this a Linux kernel namespace that is disabled by default and must be enabled at Docker engine runtime to be used?
Solution: mnt

A.No

B.Yes

Question 64

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.Both Bob's and Alice's commands result in exactly the same outcome, which is 3 instances 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 only updates the service definition, but no new replicas are started. Alice's command results in the actual scaling up of the 'web' service.

D.Bob's command results in an error. Alice's command updates the number of replicas of the 'web' service to 3.

Question 65

A company's security policy specifies that development and production containers must run on separate nodes in a given Swarm cluster.
Can this be used to schedule containers to meet the security policy requirements?
Solution: label contraints