KCNA practice questions 111–120

1. Question 111 · 282 in bank

   What is a Kubernetes service with no cluster IP address called?

   • AHeadless Service
   • BNodeless Service
   • CIPLess Service
   • DSpecless Service

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   Answer: A

   Explanation

   A. Headless Service Here's why: Headless Service: This type of service doesn't have a cluster IP address assigned. Instead, it maps directly to the pods it manages, allowing communication with individual pods using their unique IP addresses. Nodeless Service: This term isn't commonly used in Kubernetes. Services can exist and function even without a dedicated node running them. IPLess Service: While this might seem like a logical term, "Headless Service" is the official designation in Kubernetes. Specless Service: A service definition requires a specification file (usually YAML). A service without a spec wouldn't be a valid service at all

   Source: Adapted from community discussion — EzBL

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2. Question 112 · 282 in bank

   What is the default deployment strategy in Kubernetes?

   • ARolling update
   • BBlue/Green deployment
   • CCanary deployment
   • DRecreate deployment

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   Answer: A

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3. Question 113 · 282 in bank

   Which command provides information about the field replicas within the spec resource of a deployment object?

   • Akubectl get deployment.spec.replicas
   • Bkubectl explain deployment.spec.replicas
   • Ckubectl describe deployment.spec.replicas
   • Dkubectl explain deployment --spec.replicas

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   Answer: B

   Explanation

   A. kubectl get deployment.spec.replicas: This command attempts to retrieve the value of replicas directly from the deployment resource. However, it's not a standard way to access nested fields like spec.replicas. B. kubectl explain deployment.spec.replicas: This command is used to get documentation or information about a specific field within a Kubernetes resource definition. It will provide details about what the replicas field represents within the spec of a deployment. C. kubectl describe deployment.spec.replicas: This command describes an existing resource, such as a deployment, but it does not specifically explain the meaning or purpose of a field like replicas within the spec. D. kubectl explain deployment --spec.replicas: This command is close but not entirely correct. It attempts to explain a flag --spec.replicas for the kubectl explain command, rather than directly explaining the replicas field within the spec of a deployment.

   Source: Adapted from community discussion — EzBL

   References

   • Kubernetes documentation

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4. Question 114 · 282 in bank

   Which of the following is a responsibility of the governance board of an open source project?

   • ADecide about the marketing strategy of the project.
   • BReview the pull requests in the main branch.
   • COutline the project's “terms of engagement”.
   • DDefine the license to be used in the project.

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   Answer: C

   Explanation

   Governing Board is responsible for marketing and other business oversight and budget decisions for the CNCF i think answer is A

   Source: Adapted from community discussion — abu7midan

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5. Question 115 · 282 in bank

   What is the role of a NetworkPolicy in Kubernetes?

   • AThe ability to cryptic and obscure all traffic.
   • BThe ability to classify the Pods as isolated and non isolated.
   • CThe ability to prevent loopback or incoming host traffic.
   • DThe ability to log network security events.

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   Answer: B

   References

   • Kubernetes documentation

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6. Question 116 · 282 in bank

   What are the most important resources to guarantee the performance of an etcd cluster?

   • ACPU and disk capacity.
   • BNetwork throughput and disk I/O.
   • CCPU and RAM memory.
   • DNetwork throughput and CPU.

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   Answer: B

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7. Question 117 · 282 in bank

   How do you deploy a workload to Kubernetes without additional tools?

   • ACreate a Bash script and run it on a worker node.
   • BCreate a Helm Chart and install it with helm.
   • CCreate a manifest and apply it with kubectl.
   • DCreate a Python script and run it with kubectl.

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   Answer: C

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8. Question 118 · 282 in bank

   How do you perform a command in a running container of a Pod?

   • Akubectl exec --
   • Bdocker exec
   • Ckubectl run --
   • Dkubectl attach -i

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   Answer: A

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9. Question 119 · 282 in bank

   How to create a headless service?

   • ABy specifying .spec.ClusterIP: headless
   • BBy specifying .spec.clusterIP: None
   • CBy specifying .spec.ClusterIP: 0.0.0.0
   • DBy specifying .spec.ClusterIP: localhost

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   Answer: B

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10. Question 120 · 282 in bank

    How does dynamic storage provisioning work?

    • AA user requests dynamically provisioned storage by including an existing storage class in their PersistentVolumeClaim.
    • BAn administrator creates a storage class and includes it in their pod YAML definition file without creating a PersistentVolumeClaim.
    • CA pod requests dynamically provisioned storage by including a storage class and the pod name in their PersistentVolumeClaim.
    • DAn administrator creates a PersistentVolume and includes the name of the PersistentVolume in their pod YAML definition file.

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    Answer: A

    References

    • Kubernetes documentation

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KCNA practice, question 111. 282 questions available.