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[General] Free PDF 2026 KCNA: Kubernetes and Cloud Native Associate Unparalleled Valid Exa

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【General】 Free PDF 2026 KCNA: Kubernetes and Cloud Native Associate Unparalleled Valid Exa

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q183-Q188):NEW QUESTION # 183
How many different Kubernetes service types can you define?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Answer: D
Explanation:
Kubernetes defines four primary Service types, which is why C (4) is correct. The commonly recognized Service spec.type values are:
ClusterIP: The default type. Exposes the Service on an internal virtual IP reachable only within the cluster. This supports typical east-west traffic between workloads.
NodePort: Exposes the Service on a static port on each node. Traffic to <NodeIP>:<NodePort> is forwarded to the Service endpoints. This is often used for simple external access in environments without load balancers, or as a building block for other systems.
LoadBalancer: Integrates with a cloud provider (or load balancer implementation) to provision an external load balancer and route traffic to the Service. This is common in managed Kubernetes.
ExternalName: Maps the Service name to an external DNS name via a CNAME record, allowing in-cluster clients to use a consistent Service DNS name to reach an external dependency.
Some people also talk about "Headless Services," but headless is not a separate type; it's a behavior achieved by setting clusterIP: None. Headless Services still use the Service API object but change DNS and virtual-IP behavior to return endpoint IPs directly rather than a ClusterIP. That's why the canonical count of "Service types" is four.
This question tests understanding of the Service abstraction: Service type controls how a stable service identity is exposed (internal VIP, node port, external LB, or DNS alias), while selectors/endpoints control where traffic goes (the backend Pods). Different environments will favor different types: ClusterIP for internal microservices, LoadBalancer for external exposure in cloud, NodePort for bare-metal or simple access, ExternalName for bridging to outside services.
Therefore, the verified answer is C (4).

NEW QUESTION # 184
You have a Kubernetes cluster with a HorizontalPodAutoscaler (HPA) configured for your application. The HPA is set to scale the application based on CPU utilization. The application suddenly experiences a surge in traffic, causing high CPU usage. How does the HPA respond to this scenario?
  • A. The HPA scales up the application only if CPU utilization exceeds a predefined threshold.
  • B. The HPA only scales down the application when CPU utilization drops below a certain threshold.
  • C. The HPA scales up the application by increasing the resource requests for existing Pods.
  • D. The HPA immediately scales up the application by creating new Pods.
  • E. The HPA scales up the application after a configurable delay to avoid over-provisioning.
Answer: A
Explanation:
The HPA typically has a defined threshold (e.g., 80% CPU utilization) and a scaling policy (e.g., add one Pod if CPU exceeds the threshold). The HPA won't immediately scale up upon a traffic surge; it will wait for the CPU utilization to surpass the specified threshold before triggering the scaling action.

NEW QUESTION # 185
What are the initial namespaces that Kubernetes starts with?
  • A. default, system, kube-public
  • B. default, kube-system, kube-public, kube-node-lease
  • C. kube-default, system, kube-main, kube-primary
  • D. kube-default, kube-system, kube-main, kube-node-lease
Answer: B
Explanation:
Kubernetes creates a set of namespaces by default when a cluster is initialized. The standard initial namespaces are default, kube-system, kube-public, and kube-node-lease, making A correct.
* default is the namespace where resources are created if you don't specify another namespace. Many quick-start examples deploy here, though production environments typically use dedicated namespaces per app/team.
* kube-system contains objects created and managed by Kubernetes system components (control plane add-ons, system Pods, controllers, DNS components, etc.). It's a critical namespace, and access is typically restricted.
* kube-public is readable by all users (including unauthenticated users in some configurations) and is intended for public cluster information, though it's used sparingly in many environments.
* kube-node-lease holds Lease objects used for node heartbeats. This improves scalability by reducing load on etcd compared to older heartbeat mechanisms and helps the control plane track node liveness efficiently.
The incorrect options contain non-standard namespace names like "system," "kube-main," or "kube-primary," and "kube-default" is not a real default namespace. Kubernetes' built-in namespace set is well-documented and consistent with typical cluster bootstraps.
Understanding these namespaces matters operationally: system workloads and controllers often live in kube- system, and many troubleshooting steps involve inspecting Pods and events there. Meanwhile, kube-node- lease is key to node health tracking, and default is the catch-all if you forget to specify -n.
So, the verified answer is A: default, kube-system, kube-public, kube-node-lease.
=========

NEW QUESTION # 186
Which of the following container runtime is planned to be deprecated in Kubernetes 1.20 and high-er?
  • A. None of the options
  • B. podman
  • C. docker
  • D. containerd
  • E. cri-o
Answer: C
Explanation:
https://kubernetes.io/blog/2020/ ... ernetes-and-docker/


NEW QUESTION # 187
Which of the following will view the snapshot of previously terminated ruby container logs from Pod web-1?
  • A. kubectl logs -p -c web-1 ruby
  • B. kubectl logs -p ruby web-1
  • C. kubectl logs -p -c ruby web-1
  • D. kubectl logs -c ruby web-1
Answer: C
Explanation:
To view logs from the previously terminated instance of a container, you use kubectl logs -p. To select a specific container in a multi-container Pod, you use -c <containerName>. Combining both gives the correct command for "previous logs from the ruby container in Pod web-1," which is option A: kubectl logs -p -c ruby web-1.
The -p (or --previous) flag instructs kubectl to fetch logs for the prior container instance. This is most useful when the container has restarted due to a crash (CrashLoopBackOff) or was terminated and restarted. Without -p, kubectl logs shows logs for the currently running container instance (or the most recent if it's completed, depending on state).
Option B is close but wrong for the question: it selects
the ruby container (-c ruby) but does not request the previous instance snapshot, so it returns current logs, not the prior-terminated logs. Option C is missing the -c container selector and is also malformed: kubectl logs -p expects the Pod name (and optionally container); ruby is not a flag positionally correct here. Option D has argument order incorrect and mixes Pod and container names in the wrong places.
Operationally, this is a common Kubernetes troubleshooting workflow: if a container restarts quickly, current logs may be short or empty, and the actionable crash output is in the previous instance logs. Using kubectl logs -p often reveals stack traces, fatal errors, or misconfiguration messages. In multi-container Pods, always pair -p with -c to ensure you're looking at the right container.
Therefore, the verified correct answer is A.

NEW QUESTION # 188
......
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