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Updated Feb-2023 Pass KCNA Exam - Real Practice Test Questions

Linux Foundation KCNA Exam Syllabus Topics:

Topic	Details
Topic 1	Container Orchestration Fundamentals Container Orchestration, Networking, Service Mesh, Security
Topic 2	Telemetry & Observability Cloud Native Observability
Topic 3	Kubernetes Architecture, Kubernetes Fundamentals, Kubernetes Resources, Kubernetes API
Topic 4	Application Delivery Fundamentals GitOps, CI CD Cloud Native Application Delivery
Topic 5	Community and Governance, Roles and Personas Cloud Native Architecture1

 

NEW QUESTION 49
A new Pod is created. Then, the Pod is assigned to a Node. Which Kubernetes component was re-sponsible for determining which Node to assign the Pod to?

• A. Controller manager
• B. Scheduler
• C. kubelet
• D. API Server

Answer: B

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

 

NEW QUESTION 50
'kubectl delete -n my-ns po,svc --all' will delete pods and services including uninitialized ones in the namespace 'my-ns'

• A. FALSE
• B. TRUE

Answer: B

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

 

NEW QUESTION 51
Which style of operations are preferred for K8S and cloud native applications?

• A. JSON
• B. Declarative
• C. Imperative

Answer: B

Explanation:
https://kubernetes.io/docs/tasks/manage-kubernetes-objects/declarative-config/#trade-offs

 

NEW QUESTION 52
What Kubernetes resource would allow you to run one Pod on some of your Nodes?

• A. Deployment
• B. DaemonSet
• C. ClusterSet
• D. ReplicaSet

Answer: B

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

 

NEW QUESTION 53
What is the name of the Kubernetes agent that runs on each worker nodes?

• A. kube-proxy
• B. kubelet
• C. pod
• D. systemd

Answer: B

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

 

NEW QUESTION 54
What is the name for the tool that manages communication between pods, injects a sidecar proxy container into each pod and directs network traffic through the proxy container?

• A. Deployment
• B. namespace
• C. Service
• D. Service mesh
• E. Network policy

Answer: D

 

NEW QUESTION 55
Which organizational persona creates Service Level Agreements 'SLA', Service Level Objectives 'SLO', and Service Level Indicator 'SLI'?

• A. DevSecOps
• B. Security and Compliance Engineer
• C. Site Reliability Engineer (SRE)
• D. Developer
• E. DevOps

Answer: C

Explanation:
SREs create SLAs, SLOs, and SLIs to define and implement standards for application and infra-structure reliability.

 

NEW QUESTION 56
What is the use of labels in Kubernetes?

• A. It is used to assign key-value pair to an object
• B. All of the options
• C. It is used to assign a name to an object.
• D. It is used to assign annotation to an object

Answer: A

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

 

NEW QUESTION 57
Which of the following best describes the way kubernetes Role-based access control (RBAC) works?

• A. Kubernetes does not do RBAC
• B. Kubernetes RBAC is responsible for authenticating subjects such as users and groups
• C. Kubernetes RBAC states which users can perform which actions against which re-source
• D. Kubernetes RBAC lists which operations on which resources are denied to users

Answer: C

Explanation:
https://kubernetes.io/docs/reference/access-authn-authz/rbac/

 

NEW QUESTION 58
Which command is used to expose Kubernetes service

• A. kubectl create
• B. kubectl expose
• C. kubectl run

Answer: B

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

 

NEW QUESTION 59
Which role is responsible of creating service level indicator 'SLI', service level objective 'SLO', & Service Level Agreements 'SLA'

• A. Site reliability engineer 'SRE'
• B. Developer
• C. GitOps
• D. DevOps
• E. Security and compliance engineer

Answer: A

Explanation:
https://www.atlassian.com/incident-management/kpis/sla-vs-slo-vs-sli

 

NEW QUESTION 60
In Kubernetes, what is considered the primary cluster data source?

• A. scheduler
• B. etcd (pronounce: esty-d)
• C. api server
• D. kubelet

Answer: B

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

 

NEW QUESTION 61
What is the command used to scale the application?

• A. kubectl explain
• B. kubectl scale
• C. kubectl run

Answer: B

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

 

NEW QUESTION 62
Which statement is true about Pod Networking?

• A. All containers in a pod share a single IP address
• B. All pod requires an external DNS server to get the hostname
• C. All pod requires NAT to get a unique IP address.
• D. All containers in a pod get a unique IP address

Answer: A

Explanation:
https://kubernetes.io/docs/concepts/workloads/pods/#pod-networking

 

NEW QUESTION 63
Which of the following container runtime is planned to be deprecated in Kubernetes 1.20 and high-er?

• A. docker
• B. cri-o
• C. containerd
• D. None of the options
• E. podman

Answer: A

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

 

NEW QUESTION 64
Which authentication method allows JWTs to authenticate?

• A. Client 'TLS' certificates
• B. Anonymous
• C. OpenId connect
• D. OPA gatekeeper

Answer: C

 

NEW QUESTION 65
Which control plane component is responsible for scheduling pods?

• A. kube-proxy
• B. kube scheduler
• C. kube api-server
• D. kubelet

Answer: B

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

 

NEW QUESTION 66
What feature is used for selecting the container runtime configuration?

• A. RuntimeClass
• B. Runtime
• C. RuntimeContainer
• D. RuntimeConfig

Answer: A

Explanation:
https://kubernetes.io/docs/concepts/containers/runtime-class/

 

NEW QUESTION 67
What command can you use to get documentation about a resource type from the command line?

• A. kubectl api-resources
• B. kubectl explain
• C. kubeadm get-resource
• D. kubectl get

Answer: B

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

 

NEW QUESTION 68
Which of the following is not the required field to describe Kubernetes objects?

• A. spec
• B. apiVersion
• C. Kind
• D. Container
• E. metadata

Answer: D

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

 

NEW QUESTION 69
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