KCNA practice questions 81–90

1. Question 81 · 282 in bank

   Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called:

   • Anamespaces
   • Bcontainers
   • Chypervisors
   • Dcgroups

   Show answer

   Answer: A

   Explanation

   https://kubernetes.io/docs/concepts/overview/working-with-objects/namespaces/ "Namespaces are intended for use in environments with many users spread across multiple teams, or projects. For clusters with a few to tens of users, you should not need to create or think about namespaces at all. Start using namespaces when you need the features they provide."

   Source: Adapted from community discussion — SeaH0rse66

   References

   • Kubernetes documentation

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2. Question 82 · 282 in bank

   What component enables end users, different parts of the Kubernetes cluster, and external components to communicate with one another?

   • Akubectl
   • BAWS Management Console
   • CKubernetes API
   • DGoogle Cloud SDK

   Show answer

   Answer: C

   Explanation

   The Kubernetes API serves as the primary interface for communication between end users, different parts of the Kubernetes cluster, and external components.

   Source: Adapted from community discussion — SeaH0rse66

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3. Question 83 · 282 in bank

   Which command will list the resource types that exist within a cluster?

   • Akubectl api-resources
   • Bkubectl get namespaces
   • Ckubectl api-versions
   • Dcurl https://kubectrl/namespaces

   Show answer

   Answer: A

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4. Question 84 · 282 in bank

   Which of these components is part of the Kubernetes Control Plane?

   • Acoredns
   • Bcloud-controller-manager
   • Ckube-proxy
   • Dkubelet

   Show answer

   Answer: B

   References

   • Kubernetes documentation

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5. Question 85 · 282 in bank

   Which of the following systems is NOT compatible with the CRI runtime interface standard?

   • ACRI-0
   • Bdockershim
   • Csystemd
   • Dcontainerd

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   Answer: C

   References

   • Kubernetes documentation

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6. Question 86 · 282 in bank

   What is a key feature of a container network?

   • AProxying REST requests across a set of containers.
   • BAllowing containers running on separate hosts to communicate.
   • CAllowing containers on the same host to communicate.
   • DCaching remote disk access.

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   Answer: B

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7. Question 87 · 282 in bank

   How can you monitor the progress for an updated Deployment/DaemonSets/StatefulSets?

   • Akubectl rollout watch
   • Bkubectl rollout progress
   • Ckubectl rollout state
   • Dkubectl rollout status

   Show answer

   Answer: D

   Explanation

   Option A (kubectl rollout watch) is not the correct choice because the kubectl rollout watch command is used to continuously monitor the rollout progress of a deployment, allowing you to watch for changes in the rollout status in real-time. However, it is specifically designed for monitoring deployments and does not directly apply to DaemonSets or StatefulSets. While you could use kubectl rollout watch for deployments, it may not provide accurate or relevant information for DaemonSets or StatefulSets. Therefore, option A is not the most suitable command for monitoring the progress of updates to DaemonSets or StatefulSets. On the other hand, option D (kubectl rollout status) is a more generic command that works for all types of rollouts, including deployments, DaemonSets, and StatefulSets. It provides detailed information about the status of the rollout, making it a better choice for monitoring the progress of updates across different types of workload controllers in Kubernetes.

   Source: Adapted from community discussion — SeaH0rse66

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8. Question 88 · 282 in bank

   What is the default value for authorization-mode in Kubernetes API server?

   • A--authorization-mode=RBAC
   • B--authorization-mode=AlwaysAllow
   • C--authorization-mode=AlwaysDeny
   • D--authorization-mode=ABAC

   Show answer

   Answer: B

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9. Question 89 · 282 in bank

   What is the goal of load balancing?

   • AAutomatically measure request performance across instances of an application.
   • BAutomatically distribute requests across different versions of an application.
   • CAutomatically distribute instances of an application across the cluster.
   • DAutomatically distribute requests across instances of an application.

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   Answer: D

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10. Question 90 · 282 in bank

    How are ReplicaSets and Deployments related?

    • ADeployments manage ReplicaSets and provide declarative updates to Pods.
    • BReplicaSets manage stateful applications, Deployments manage stateless applications.
    • CDeployments are runtime instances of ReplicaSets.
    • DReplicaSets are subsets of Jobs and CronJobs which use imperative Deployments.

    Show answer

    Answer: A

    Explanation

    Deployments are higher-level abstractions in Kubernetes that manage ReplicaSets.ReplicaSets, on the other hand, are lower-level controllers responsible for maintaining a specified number of identical Pods to ensure high availability and fault tolerance. ReplicaSets are used by Deployments to manage the lifecycle of Pods, including scaling, rolling updates, and maintaining a desired number of replicas.

    Source: Adapted from community discussion — SeaH0rse66

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KCNA practice, question 81. 282 questions available.