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Linux Foundation KCNA Certification Exam is designed for IT professionals who are interested in developing and deploying cloud-native applications using Kubernetes and other cloud-native technologies. Kubernetes and Cloud Native Associate certification is ideal for developers, DevOps engineers, system administrators, and IT professionals who want to enhance their skills and knowledge in cloud-native application development and deployment. Kubernetes and Cloud Native Associate certification is also suitable for organizations that want to ensure that their IT teams have the necessary skills and knowledge to develop and deploy cloud-native applications.
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NEW QUESTION # 92
Which of the following commands could a cluster administrator use to prevent Pod scheduling in a node temporarily, for maintenance purposes?
Answer: D
Explanation:
The kubectl cordon command marks a node as unschedulable, temporarily preventing new Pods from being scheduled on it while allowing existing Pods to continue running during maintenance.
NEW QUESTION # 93
You are running a stateless application in a Kubernetes cluster. The application has multiple
instances deployed as Pods. You need to ensure that all incoming traffic to the application is
distributed evenly across these Pods. Which Kubernetes resource should you use to achieve this?
Answer: D
Explanation:
A Service is a Kubernetes resource that provides a stable endpoint for a group of Pods. It acts as a load balancer, distributing traffic across the Pods in a round-robin manner by default. This ensures that all Pods receive an equal share of the incoming traffic.
NEW QUESTION # 94
Which of the following is the correct command to run an nginx deployment with 2 replicas?
Answer: B
Explanation:
The correct answer is B: kubectl create deploy nginx --image=nginx --replicas=2. This uses kubectl create deployment (shorthand create deploy) to generate a Deployment resource named nginx with the specified container image. The --replicas=2 flag sets the desired replica count, so Kubernetes will create two Pod replicas (via a ReplicaSet) and keep that number stable.
Option A is incorrect because kubectl run is primarily intended to run a Pod (and in older versions could generate other resources, but it's not the recommended/consistent way to create a Deployment in modern kubectl usage). Option C is invalid syntax: kubectl subcommand order is incorrect; you don't say kubectl create nginx deployment. Option D uses a non-existent --count flag for Deployment replicas.
From a Kubernetes fundamentals perspective, this question tests two ideas: (1) Deployments are the standard controller for running stateless workloads with a desired number of replicas, and (2) kubectl create deployment is a common imperative shortcut for generating that resource. After running the command, you can confirm with kubectl get deploy nginx, kubectl get rs, and kubectl get pods -l app=nginx (label may vary depending on kubectl version). You'll see a ReplicaSet created and two Pods brought up.
In production, teams typically use declarative manifests (kubectl apply -f) or GitOps, but knowing the imperative command is useful for quick labs and validation. The key is that replicas are managed by the controller, not by manually starting containers-Kubernetes reconciles the state continuously.
Therefore, B is the verified correct command.
NEW QUESTION # 95
You are deploying a web application with two containers: a frontend container for the website and a backend container for the application logic. What is the best practice for defining these containers within a Kubernetes pod?
Answer: E
Explanation:
The best practice is to create a single pod with two containers, one for the frontend and one for the backend, connected through a service. This allows for efficient resource utilization, container isolation, and communication through the service. Option A might result in unnecessary complexity and resource usage- Option B would introduce tight coupling and lack of flexibility. Option C might lead to complexity in managing shared volumes. Option D, while possible, might be less efficient than using a service for communication.
NEW QUESTION # 96
What's the difference between a security profile and a security context?
Answer: C
Explanation:
The correct answer is B. In Kubernetes, a securityContext is part of the Pod and container specification that configures runtime security settings for that workload-things like runAsUser, runAsNonRoot, Linux capabilities, readOnlyRootFilesystem, allowPrivilegeEscalation, SELinux options, seccomp profile selection, and filesystem group (fsGroup). These settings directly affect how the Pod's containers run on the node.
A security profile, in contrast, is a higher-level policy/standard enforced by the cluster control plane (typically via admission control) to ensure workloads meet required security constraints. In modern Kubernetes, this concept aligns with mechanisms like Pod Security Standards (Privileged, Baseline, Restricted) enforced through Pod Security Admission. The "profile" defines what is allowed or forbidden (for example, disallow privileged containers, disallow hostPath mounts, require non-root, restrict capabilities). The control plane enforces these constraints by validating or rejecting Pod specs that do not comply-ensuring consistent security posture across namespaces and teams.
Option A and D are incorrect because security contexts do not "configure clusters and namespaces at runtime"; security contexts apply to Pods/containers. Option C reverses the relationship: security profiles don't configure Pods at runtime; they constrain what security context settings (and other fields) are acceptable.
Practically, you can think of it as:
SecurityContext = workload-level configuration knobs (declared in manifests, applied at runtime).
SecurityProfile/Standards = cluster-level guardrails that determine which knobs/settings are permitted.
This separation supports least privilege: developers declare needed runtime settings, and cluster governance ensures those settings stay within approved boundaries. Therefore, B is the verified answer.
NEW QUESTION # 97
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