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Free Docker DCA Exam Braindumps

Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate?

Solution: Pass the '--insecure-registry' flag to the daemon at run time.

  1. Yes
  2. No

Answer(s): A

Explanation:

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The Kubernetes yaml shown below describes a networkPolicy.



Will the networkPolicy BLOCK this traffic?

Solution: a request issued from a pod bearing the tier: backend label, to a pod bearing the tier:
frontend label

  1. Yes
  2. No

Answer(s): B

Explanation:

The networkPolicy shown in the image is a Kubernetes yaml file that describes a networkPolicy. This networkPolicy will not block traffic from a pod bearing the tier: backend label, to a pod bearing the tier: frontend label. This is because the networkPolicy is configured to allow ingress traffic from pods with the tier: backend label to pods with the tier: frontend label.


Reference:

Content trust in Docker | Docker Docs

Docker Content Trust: What It Is and How It Secures Container Images

Automation with content trust | Docker Docs



The Kubernetes yaml shown below describes a networkPolicy.



Will the networkPolicy BLOCK this traffic?

Solution: a request issued from a pod lacking the tier: api label, to a pod bearing the tier: backend label

  1. Yes
  2. No

Answer(s): A

Explanation:

The networkPolicy shown in the image is designed to block traffic from pods lacking the tier: api label, to pods bearing the tier: backend label. This is because the policy is set to matchLabels: tier:
backend, and the ingress is set to - from: podSelector: matchLabels: tier: api. Therefore, any traffic that does not match these labels will be blocked.


Reference:

Isolate containers with a user namespace | Docker Docs

The mnt namespace - Docker Cookbook - Second Edition

Container security fundamentals part 2: Isolation & namespaces

I hope this helps you understand the concept of networkPolicy and how it works with Kubernetes. If you have any other questions related to Docker, please feel free to ask me.



Are these conditions sufficient for Kubernetes to dynamically provision a persistentVolume, assuming there are no limitations on the amount and type of available external storage?

Solution: A default provisioner is specified, and subsequently a persistentVolumeClaim is created.

  1. Yes
  2. No

Answer(s): B

Explanation:

= The conditions are not sufficient for Kubernetes to dynamically provision a persistentVolume, because they are missing a StorageClass object. A StorageClass object defines which provisioner should be used and what parameters should be passed to that provisioner when dynamic provisioning is invoked. A persistentVolumeClaim must specify the name of a StorageClass in its storageClassName field to request a dynamically provisioned persistentVolume. Without a StorageClass, Kubernetes cannot determine how to provision the storage for the claim.


Reference:

Dynamic Volume Provisioning | Kubernetes

Persistent volumes and dynamic provisioning | Google Kubernetes Engine ...

Dynamic Provisioning and Storage Classes in Kubernetes or Dynamic Provisioning and Storage Classes in Kubernetes






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