DCA Practice Exam Questions and Answers

Which of the following are types of namespaces used by Docker to provide isolation? (Choose 2.)

Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.

Is this a way to accomplish this?

Solution: Add all the resources to the default namespace.

Does this command create a swarm service that only listens on port 53 using the UDP protocol?

Solution: ‘docker service create -name dns-cache -p 53:53 -service udp dns-cache'

How do you configure Docker engine to use a registry that is not configured with TLS certificates from a trusted CA?

The Kubernetes yaml shown below describes a clusterIP service.

Is this a correct statement about how this service routes requests?

Solution: Traffic sent to the IP of this service on port 8080 will be routed to port 80 in a random pod with the label aPP: nginx.

What service mode is used to deploy a single task of a service to each node?

Is this a function of UCP?

Solution: scans images to detect any security vulnerability

Will this configuration achieve fault tolerance for managers in a swarm?

Solution: only two managers, one active and one passive.

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

Solution: user

You want to provide a configuration file to a container at runtime. Does this set of Kubernetes tools and steps accomplish this?

Solution: Mount the configuration file directly into the appropriate pod and container using the .spec.containers.configMounts key.