Linux Foundation Linux Foundation Certifications KCNA Questions & Answers

• Question 71:

  There are three Nodes in a cluster, and want to run exactly one replica of a Pod on each Node. Pre-fer to

  automatically create a replica on any new Nodes when they are added.

  Which Kubernetes re-source should you use?

  A. DaemonSet

  B. ReplicaSet

  C. NodeSet

  D. StatefulSet

  E. Deployment

  Correct Answer: A

  https://kubernetes.io/docs/concepts/workloads/controllers/daemonset/ A DaemonSet runs replicas on all (or just some) Nodes in the cluster.

  

• Question 72:

  What is the command used to login to the pod?

  A. kubectl login

  B. kubectl list

  C. kubectl exec

  D. kubectl get

  Correct Answer: C

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

  

• Question 73:

  What is autoscaling?

  A. Automatically measuring resource usage

  B. Automatically assigning workloads to nodes in a cluster

  C. Automatically repairing broken application instances

  D. Automatically adding or removing compute resources as needed

  Correct Answer: D

  https://kubernetes.io/blog/2016/07/autoscaling-in-kubernetes/ Autoscaling means automatically scaling up or down in response to real-time usage data.

• Question 74:

  What CNCF project is the leading DNS project in the CNCF landscape?

  A. Kubernetes

  B. gRPC

  C. KubeDNS

  D. CoreDNS

  Correct Answer: D

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

  

• Question 75:

  What command to view the kube config?

  A. kubectl view config

  B. kubectl config view

  C. kubectl get kubeconfig

  Correct Answer: B

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

  

• Question 76:

  What framework allows developers to write code without worrying about the servers and operating systems they will run on?

  A. Virtualization

  B. Docker

  C. Serverless D. Kubernetes

  Correct Answer: C

• Question 77:

  What does CNCF stand for?

  A. Cloud Native Computing Foundation

  B. Cloud Native Cloud Foundation

  C. Cloud Native Container Foundation

  Correct Answer: A

  Explanation: https://www.cncf.io/about/who-we-are/

  

• Question 78:

  What is container runtime?

  A. The amount of time it takes a container to execute

  B. A container image format

  C. Another term of kubelet or kubectl

  D. Software that runs containers

  Correct Answer: D

  Explanation: https://www.aquasec.com/cloud-native-academy/container- security/container-runtime/

  

• Question 79:

  How can you achieve cost optimization in the cloud environment?

  A. Use On Demand instances

  B. Use Spot Instances

  C. Use Reserved Instances

  D. Use Bare Metal

  Correct Answer: C

• Question 80:

  Which tool is built on the GitOps toolkit?

  A. Jenkins-X

  B. GitHub Workflow and Actions

  C. Flux

  D. Jenkins

  E. ArgoCD

  F. Travis CI

  Correct Answer: C

  Explanation: https://fluxcd.io/#gitops-toolkit

  

  Note: Argo CD is a GitOps tool and not using GitOps toolkit