Linux Foundation Linux Foundation Certifications KCNA Questions & Answers

• Question 51:

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

  A. POD

  B. Deployment

  C. Horizontal pod autoscaler

  D. Api Scheduler

  E. Replicasets

  Correct Answer: E

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

  

• Question 52:

  Which component of the kubernetes control-plane (master) are all requests to deploy and manage objects posted to?

  A. ETCD

  B. Controller Manager

  C. Kube-proxy

  D. API Server

  E. Kubelet

  Correct Answer: D

  Explanation: https://kubernetes.io/docs/reference/command-line-tools-reference/kube- apiserver/

  

• Question 53:

  Which of the following container runtime is planned to be deprecated in Kubernetes 1.20 and high-er?

  A. cri-o

  B. None of the options

  C. docker

  D. podman

  E. containerd

  Correct Answer: C

  Explanation: https://kubernetes.io/blog/2020/12/02/dont-panic-kubernetes-and-docker/

  

• Question 54:

  The Kubernetes API provides an interface for storing objects. Which of the following describes the type of objects stored by the Kubernetes API?

  A. Containers

  B. REST

  C. YAML

  D. ETCD

  Correct Answer: B

  Explanation: Kubernetes objects are RESTful objects.

• Question 55:

  What is the name for a service that has no clusterIp address?

  A. Headless

  B. NodePort

  C. ClusterIP

  D. LoadBalancer

  Correct Answer: A

  Explanation: https://kubernetes.io/docs/concepts/services-networking/service/#headless- services

  

• Question 56:

  Which of the following factors does scheduling take into account when selecting a Node?

  A. How many replicas there are in a Deployment

  B. Services

  C. Resource requirements

  D. The number of existing Pods on a Node

  Correct Answer: C

  Explanation: Scheduling takes resource requirements into account in the form of resource requests.

• Question 57:

  What tool allows us to build useful visual representations of prometheus data?

  A. Grafana

  B. kubectl

  C. Distributed system tracing

  D. Rook

  E. Kibana

  Correct Answer: A

  Explanation: https://prometheus.io/

  

• Question 58:

  What are container runtimes with Kubernetes?

  A. CRI-O

  B. lxd

  C. containerd

  D. Dockershim

  Correct Answer: AC

  Explanation: https://kubernetes.io/docs/setup/production-environment/container-runtimes/

  

• Question 59:

  Which of the following computing model doesn't require you to provision infrastructure?

  A. None of the above

  B. Bare Metal

  C. Compute Engine

  D. Virtual Machines

  E. Serverless

  Correct Answer: E

  

• Question 60:

  What cloud-native construct does a kubernetes pod wrap?

  A. Container

  B. Virtual Machine (VM)

  C. side car process

  D. Docker image

  Correct Answer: A

  Explanation: Kubernetes is an orchestrator of containerized apps. However, containers must be wrapped in pods before they can be deployed on kubernetes.