Linux Foundation Kubernetes and Cloud Native KCNA Questions & Answers

• Question 111:

  Have a pod 'hello' and a container in that pod 'green'. Which of the following commands would get the logs for that container?

  A. alias k='kubectl' k logs -p hello -c green

  B. alias k='kubectl' k logs hello -c green

  C. alias k='kubectl' k get logs -p hello -c green

  D. alias k='kubectl' k logs -p hello green

  Correct Answer: B

  Explanation: https://kubernetes.io/docs/reference/generated/kubectl/kubectl- commands#logs

  

• Question 112:

  Which of the following is not the part of Kubernetes Control Plane?

  A. kube scheduler B. etcd (pronounce: esty-d)

  C. kube api-server

  D. kube-proxy

  Correct Answer: D

  Explanation: https://kubernetes.io/docs/concepts/overview/components/

  

• Question 113:

  What Linux feature is used to provide isolation for containers?

  A. Processes

  B. Services

  C. NetworkPolicy

  D. Control groups

  Correct Answer: D

  Explanation: Control groups provide isolation for container processes, keeping them separate from other process-es on the host.

• Question 114:

  What do GitOps tools do in kubernetes?

  A. They allow us to make changes to a kubernetes cluster using a Git repository

  B. They manage the source code of kubernetes itself

  C. They allow us to store software code in Git

  D. They allows us to store container images in repositories

  Correct Answer: A

  Explanation: https://fluxcd.io/docs/components/

  

• Question 115:

  What does the 'kops' acronym means?

  A. Kubernetes Open Platform Specification

  B. Kubernetes Operations

  C. Kubernetes Operators

  D. Kubernetes Operation Policy Specification

  Correct Answer: B

  Explanation: https://github.com/kubernetes/kops

  

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• Question 116:

  Which prometheus metric type represents a single number value that can increase and decrease over time?

  A. Gauge

  B. Histogram

  C. Summary

  D. Counter

  Correct Answer: A

  Explanation: https://prometheus.io/docs/concepts/metric_types/#gauge

  

• Question 117:

  In distributed system tracing, is the term used to refer to a request as it passes through a single component of the distributed system?

  A. Log

  B. Span

  C. Trace

  D. Bucket

  Correct Answer: B

  Explanation: https://www.splunk.com/en_us/data-insider/what-is-distributed-tracing.html

  

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• Question 118:

  An application that is nearing its usage limit. To increase the amount of users it can handle, you allo-cate additional memory resources to each instance of the application. What type of scaling is this?

  A. Horizontal Scaling

  B. Cluster Autoscaling

  C. Recursive Scaling

  D. Vertical Scaling

  Correct Answer: D

  

• Question 119:

  Which of the following best describes a cloud-native app?

  A. An application where all logic is coded into a single large binary.

  B. An application that publishes an HTTPS web front-end.

  C. An application that takes advantages of cloud computing fromworks and their loosely coupled cloud services.

  D. An application that leverages services that are native to public cloud platforms such as Azure, GCP, and/or AWS.

  Correct Answer: C

  Explanation: Cloud-native apps leverage cloud computing frameworks and tend to be microservices based, where individual components of the app are coded as individual.

• Question 120:

  Which project in this list is a leading project in the observability space?

  A. Jaeger

  B. Vitess

  C. Argo

  D. Kubernetes

  Correct Answer: A

  Explanation: https://github.com/cncf/landscape#trail-map