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Linux Foundation KCNA(Kubernetes and Cloud Native Associate) 시험은 Kubernetes 및 Cloud Native 기술 분야의 지식과 기술을 시험하는 자격증 프로그램입니다. 이 자격증은 전 세계적으로 인정받는 자격증으로, 클라우드 컴퓨팅 산업에서 경력을 쌓으려는 전문가들에게 가치 있는 자산입니다. 이 시험은 Kubernetes 아키텍처, 배포, 네트워킹, 보안 및 문제 해결 등 폭넓은 주제를 다룹니다. 또한 컨테이너화, 마이크로서비스 및 서버리스 컴퓨팅과 같은 클라우드 네이티브 기술도 다룹니다.

리눅스 재단 KCNA 시험은 쿠버네티스와 클라우드 네이티브 기술에 대한 개인의 지식을 검증하는 인증 프로그램입니다. 이 시험은 도전적인 것으로 디자인되어 있으며, 이러한 기술과 함께 일하고 싶어하는 IT 전문가들에게 적합합니다. 이 인증서는 기술 산업에서 주요 회사들에 의해 인정되며, 개인의 진로를 발전시키고 수입 잠재력을 높일 수 있습니다. 시험을 시도하기 전에 후보자들은 충분히 준비하여 성공을 보장하는 것이 권장됩니다.

최신 Kubernetes Cloud Native Associate KCNA 무료샘플문제 (Q10-Q15):

질문 # 10
A site reliability engineer needs to temporarily prevent new Pods from being scheduled on node-
2, while keeping the existing workloads running without disruption. Which kubectl command should be used?

A. kubectl pause deployment
B. kubectl delete node-2
C. kubectl drain node-2
D. kubectl cordon node-2

정답：D

설명：
The kubectl cordon command marks the node as unschedulable, preventing new Pods from being placed on it while allowing all existing Pods to continue running without interruption.

질문 # 11
Which command provides information about the field replicas within the spec resource of a deployment object?

A. kubectl describe deployment.spec.replicas
B. kubectl get deployment.spec.replicas
C. kubectl explain deployment --spec.replicas
D. kubectl explain deployment.spec.replicas

정답：D

설명：
The correct command to get field-level schema information about spec.replicas in a Deployment is kubectl explain deployment.spec.replicas, so B is correct. kubectl explain is designed to retrieve documentation for resource fields directly from Kubernetes API discovery and OpenAPI schemas. When you use kubectl explain deployment.spec.replicas, kubectl shows what the field means, its type, and any relevant notes-exactly what "provides information about the field" implies.
This differs from kubectl get and kubectl describe. kubectl get is for retrieving actual objects or listing resources; it does not accept dot-paths like deployment.spec.replicas as a normal resource argument. You can use JSONPath/custom-columns with kubectl get deployment <name> -o jsonpath='{.spec.replicas}' to extract the live value, but that's not what option A shows, and it's not "documentation." kubectl describe provides a human-friendly summary of a live resource instance (events, status, spec), but it doesn't target schema field definitions via dot-path in the way shown in option C.
Option D is not valid syntax: kubectl explain deployment --spec.replicas is not how kubectl explain accepts nested field references. The correct pattern is positional dot notation: kubectl explain <resource>.<field>.<subfield>....
Understanding spec.replicas matters operationally: it defines the desired number of Pod replicas for a Deployment. The Deployment controller ensures that the corresponding ReplicaSet maintains that count, supporting self-healing if Pods fail. While autoscalers can adjust replicas automatically, the field remains the primary declarative knob. The question is specifically about finding information (schema docs) for that field, which is why kubectl explain deployment.spec.replicas is the verified correct answer.

질문 # 12
You are running a stateless application on Kubernetes and want to avoid persistent storage. Which of the following options is suitable?

A. Utilize a ConfigMap to store application configuration data.
B. Mount a HostPath volume to access the host machine's filesystem.
C. Create a Local Persistent Volume for each pod.
D. Use a PersistentVolumeClaim with a storage class that provides persistent storage.
E. Use an emptyDir volume to create a temporary directory within the pod.

정답：E

설명：
For stateless applications, an emptyDir volume is the most suitable choice as it provides a temporary directory within the pod, which is discarded when the pod is terminated. PersistentVolumeClaim, HostPath volumes, and Local Persistent Volumes are designed for persistent storage, unsuitable for stateless applications. ConfigMaps store application configuration data, not application data itself.

질문 # 13
Which kubectlcommand is useful for collecting information about any type of resource that is active in a Kubernetes cluster?

A. expose
B. describe
C. list
D. explain

정답：B

질문 # 14
Which of the following is the name of a container orchestration software?

A. Docker
B. CRI-O
C. Apache Mesos
D. OpenStack

정답：C

설명：
C (Apache Mesos) is correct because Mesos is a cluster manager/orchestrator that can schedule and manage workloads (including containerized workloads) across a pool of machines. Historically, Mesos (often paired with frameworks like Marathon) was used to orchestrate services and batch jobs at scale, similar in spirit to Kubernetes' scheduling and cluster management role.
Why the other answers are not correct as "container orchestration software" in this context:
* OpenStack (A) is primarily an IaaS cloud platform for provisioning compute, networking, and storage (VM-focused). It's not a container orchestrator, though it can host Kubernetes or containers.
* Docker (B) is a container platform/tooling ecosystem (image build, runtime, local orchestration via Docker Compose/Swarm historically), but "Docker" itself is not the best match for "container orchestration software" in the multi-node cluster orchestration sense that the question implies.
* CRI-O (D) is a container runtime implementing Kubernetes' CRI; it runs containers on a node but does not orchestrate placement, scaling, or service lifecycle across a cluster.
Container orchestration typically means capabilities like scheduling, scaling, service discovery integration, health management, and rolling updates across multiple hosts. Mesos fits that definition: it provides resource management and scheduling over a cluster and can run container workloads via supported containerizers.
Kubernetes ultimately became the dominant orchestrator for many use cases, but Mesos is clearly recognized as orchestration software in this category.
So, among these choices, the verified orchestration platform is Apache Mesos (C).
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질문 # 15
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