Linux Foundation Linux Foundation Certifications KCNA Questions & Answers

• Question 1:

  What is the main difference between Argo vs. Flux CD?

  A. Argo is pull-based, and Flux is push-based

  B. No difference; both are pull-based

  C. Argo is push-based, and Flux is pull-based

  D. No difference; both are push-based

  Correct Answer: C

  Explanation: AgroCD: https://argo-cd.readthedocs.io/en/stable/developer-guide/ci/#can-i- retrigger-thechecks-without-pushing-a-new-commit FluxCD: https://fluxcd.io/

• Question 2:

  Which of the following is not the required field to describe Kubernetes objects?

  A. metadata

  B. apiVersion

  C. Kind

  D. Container

  E. spec

  Correct Answer: D

  Explanation: https://kubernetes.io/docs/concepts/overview/working-with- objects/kubernetes-objects/

  

• Question 3:

  Stateful set requires which service for the network identity of pods?

  A. Ingress

  B. Load Balancer Service

  C. Headless Service

  Correct Answer: C

  Explanation: https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/

  

• Question 4:

  What is horizontal scaling?

  A. Creating a Deployment

  B. Adding resources to existing apps and servers

  C. Moving workloads from one server to another

  D. Adding additional replicas of apps and servers

  Correct Answer: D

  Explanation: https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/

  

• Question 5:

  The 4C's of Cloud Native security

  A. Chroot, Compute, Cluster and Container

  B. Cluster, Cloud, Compute, and Containers

  C. Code, Containers, Compute, and Cloud

  D. Cloud, Clusters, Containers, and Code

  Correct Answer: D

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

• Question 6:

  What can you use to add new resource types to your cluster?

  A. start container

  B. CustomResourceDefinitions

  C. init container

  D. Flux

  E. CRI-O

  Correct Answer: B

  Explanation: https://kubernetes.io/docs/concepts/extend-kubernetes/api- extension/custom-resources/

  

• Question 7:

  What is the name of the Kubernetes agent that runs on each worker nodes?

  A. kubelet

  B. systemd

  C. kube-proxy

  D. pod

  Correct Answer: A

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

  

• Question 8:

  What is the smallest possible unit in Kubernetes to run a container?

  A. pod

  B. docker

  C. service

  D. container

  Correct Answer: A

  Explanation: https://kubernetes.io/docs/concepts/workloads/pods/

  

• Question 9:

  Which kubernetes object do deployments use behind the scenes when they need to scale pods?

  A. Horizontal pod autoscaler

  B. ReplicaSets

  C. kubectl

  D. Replication controller

  Correct Answer: B

  Explanation: https://kubernetes.io/docs/concepts/workloads/controllers/replicaset/

  

• Question 10:

  How to create deployment name app-dep, image=nginx, and replicas 5 using imperative command?

  A. kubectl create app-dep deployment --image=nginx --replicas=5

  B. kubectl create deployment app-dep --image=nginx --replicas=5

  C. kubectl create app-dep deployment --replicas=5 --image=nginx

  Correct Answer: B

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