Docker Swarm

 

Docker Swarm

Raft algorithm, system can tolerate ___ failures

(N-1)/2 -- correct

Maximum number of master nodes in a swarm recommended by Docker

7 -- correct

Which of the following is not a node type in Docker Swarm?

Scheduler node -- correct

Per Raft algorithm, system requires majority of ___ members to agree on values proposed to the cluster

(N/2)+1 -- correct

Docker Swarm API command is used to communicate

external client to containers -- correct

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Docker command to initialize docker swarm

docker swarm init -- correct

Command to list the services running

docker service ls -- correct

command to get details on docker swarm commands

docker swarm --help -- correct

Which of the following is a valid comment to create a service

docker service create --name service1 -d -p 80:80 tomcat -- correct

command to list the nodes currently available as part of swarm

docker node ls -- correct

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Swarm mode has an inbuilt load balancer

Ingress -- correct

Docker assign service a _____ for the clients to identify the service

Virtual ip -- correct

Docker swarm command to drain a worker node

docker node update <worker-node> availability=drain -- correct

Technique used by Docker Swarm mode to enable multi-host networking

Routing mesh -- correct

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Docker Swarm command to inspect the new swarm service created

docker service inspect service-name -- correct

In docker swarm, all communication between nodes happens through Transport Layer security

True -- correct

In docker Swarm, you can define the task and container relationship as

one to one -- correct

Swarm task status when the task is initialized

New -- correct

Docker swarm command to activate a drain worker node

docker node update <worker-node>--availability=active -- correct

Assume a Swarm cluster has 7 swarm managers. system can tolerate ______ no. of failures

3 -- correct

Global service runs one task per worker node

True -- correct

Bridge network that connects hosts ports to container ports in overlay network

docker bridge network -- correct

worker node is responsible for container Orchestration

False -- correct

Which is not valid way to configure a pending service

None of the options -- correct

Docker command to scale an existing service by 5 instances

docker service scale service name=5 -- correct

Swarm task is

unidirectional - correct

Which is not a correct type of service deployments for docker swarm

Series -- correct

Which is not a valid way to create a docker service

UCB web UI -- correct

Docker swarm to command to remove a service

docker service rm service-name -- correct

_____ in the worker node executes the task on behalf of the worker node

executor-- correct

No. of tokens generated when the master node is initialized in swarm

two -- correct

Docker swarm commadn to autolock swarm when initialized

docker swarm init -- autolock -- correct

when a task stops, it isn't executed again, but a new task may take its place

True -- correct

docker command to list the tasks running on a service

docker service ps <service name> -- correct

Manager node can also acts as worker node

True -- correct

Docker command to list the secrets

docker secret ls -- correct

Maximum number of task that can be executed in Drain node

0 -- correct

$docker service create --name Test --secret secret1 redis. Whcih of the following is incorrect w.r.t.

the optput for this command

create a redis image for a service -- correct

docker swarm command to list the tasks running on the manaher node

docker node ps self -- correct

what happens to the current task when the availability of actibve node is modified to drain node?

Task continues to run -- correct

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