In the context of a swarm mode cluster, does this describe a node?
Solution: an instance of the Docker engine participating in the swarm
A . Yes
B . No
Answer: A
Is this statement correct about this health check definition?
The following Docker Compose file is deployed as a stack:
Is this statement correct about this health check definition?
Solution: Health checks test for app health ten seconds apart. If the test fails, the container will be restarted three times before it gets rescheduled.
A . Yes
B . No
Answer: B
How do you view the list of historical tasks for that service by using the command line?
After creating a new service named ‘http’, you notice that the new service is not registering as healthy.
How do you view the list of historical tasks for that service by using the command line?
A . ‘docker inspect http’
B . ‘docker service inspect http’
C . ‘docker service ps http’
D . ‘docker ps http’
Answer: C
Will this sequence of steps completely delete an image from disk in the Docker Trusted Registry?
Will this sequence of steps completely delete an image from disk in the Docker Trusted Registry?
Solution: Delete the image and run garbage collection on the Docker Trusted Registry.
A . Yes
B . No
Answer: B
Will this command list all nodes in a swarm cluster from the command line?
Will this command list all nodes in a swarm cluster from the command line?
Solution: ‘docker swarm nodes’
A . Yes
B . No
Answer: B
In the context of a swarm mode cluster, does this describe a node?
In the context of a swarm mode cluster, does this describe a node?
Solution: a virtual machine participating in the swarm
A . Yes
B . No
Answer: B
What is the difference between a resource limit and a resource reservation when scheduling services?
What is the difference between a resource limit and a resource reservation when scheduling services?
A . A resource limit and a resource reservation can be used interchangeably.
B . A resource limit is a soft limit for your service, while a reservation is hard limit and the docker engine will do its best to keep your service at the limit.
C . A resource limit is used to find a host with adequate resources for scheduling a hard limit for your service, while a reservation is hard limit for your service.
D . A resource limit is hard limit for your service, while a reservation is used to find a host with adequate
resources for scheduling. Correct
Answer: A
Will this action grant them read/write access to the engineering/api repository?
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution: Add them to a team in the engineering organization that has read/write access to the engineering/api repository.
A . Yes
B . No
Answer: B
Which command uses the Docker CLI to set the number of tasks of the services to 5?
You have deployed a service to swarm.
Which command uses the Docker CLI to set the number of tasks of the services to 5? (choose 2)
A . ‘docker service update –replicas=5 <service-id>’
B . ‘docker replica update <service-id>=5’
C . ‘docker update service <service-id>=5’
D . ‘docker service replicas <service-id>=5’
E . ‘docker service scale <service-id> = 5”
Answer: A,E
Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?
Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?
A . docker service create –name dns-cache -p 53:53/udp dns-cache
B . docker service create –name dns-cache -p 53:53 –service udp dns-cache
C . docker service create –name dns-cache -p 53:53 ..constraint networking.protocol.udp=true dns-cache
D . docker service create –name dns-cache -p 53:53 –udp dns-cache
Answer: A