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| Section | Weight | Objectives |
|---|---|---|
| Cloud Native Observability | 8% | - Tracing
|
| Cloud Native Architecture | 16% | - Cloud Native Landscape
|
| Container Orchestration | 22% | - Storage
|
| Cloud Native Application Delivery | 8% | - CI/CD
|
| Kubernetes Fundamentals | 46% | - Kubernetes Resources
|
>> Linux Foundation KCNA Original Questions <<
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NEW QUESTION # 187
How does dynamic storage provisioning work?
Answer: A
Explanation:
Dynamic provisioning is the Kubernetes mechanism where storage is created on-demand when a user creates a PersistentVolumeClaim (PVC) that references a StorageClass, so A is correct. In this model, the user does not need to pre-create a PersistentVolume (PV). Instead, the StorageClass points to a provisioner (typically a CSI driver) that knows how to create a volume in the underlying storage system (cloud disk, SAN, NAS, etc.). When the PVC is created with storageClassName: <class>, Kubernetes triggers the provisioner to create a new volume and then binds the resulting PV to that PVC.
This is why option B is incorrect: you do not put a StorageClass "in the Pod YAML" to request provisioning. Pods reference PVCs, not StorageClasses directly. Option C is incorrect because the PVC does not need the Pod name; binding is done via the PVC itself. Option D describes static provisioning: an admin pre-creates PVs and users claim them by creating PVCs that match the PV (capacity, access modes, selectors). Static provisioning can work, but it is not dynamic provisioning.
Under the hood, the StorageClass can define parameters like volume type, replication, encryption, and binding behavior (e.g., volumeBindingMode: WaitForFirstConsumer to delay provisioning until the Pod is scheduled, ensuring the volume is created in the correct zone). Reclaim policies (Delete/Retain) define what happens to the underlying volume after the PVC is deleted.
In cloud-native operations, dynamic provisioning is preferred because it improves developer self-service, reduces manual admin work, and makes scaling stateful workloads easier and faster. The essence is: PVC + StorageClass → automatic PV creation and binding.
NEW QUESTION # 188
Scenario: You have a Kubernetes cluster hosted in a public cloud provider. When trying to create a Service of type LoadBalancer, the external-ip is stuck in the "Pending" state. Which Kubernetes component is failing in this scenario?
Answer: C
Explanation:
When you create a Service of type LoadBalancer in a cloud environment, Kubernetes relies on cloud-provider integration to provision an external load balancer and allocate a public IP (or equivalent). The control plane component responsible for this integration is the cloud-controller-manager, so A is correct.
In Kubernetes, a LoadBalancer Service triggers a controller loop that calls the cloud provider APIs to create/update a load balancer that forwards traffic to the cluster (often via NodePorts on worker nodes, or via provider-specific mechanisms). The Service remains with EXTERNAL-IP: Pending until the cloud provider resource is successfully created and the controller updates the Service status with the assigned external address. If that status never updates, it usually indicates the cloud integration path is broken-commonly due to: missing cloud provider configuration, broken credentials/IAM permissions, the cloud-controller-manager not running/healthy, or a misconfigured cloud provider implementation.
The other options are not real Kubernetes components. Kubernetes does not include a "Load Balancer Manager" or "Cloud Architecture Manager" component name in its standard architecture. In many managed Kubernetes offerings, the cloud-controller-manager (or its equivalent) is provided/managed by the provider, but the responsibility remains the same: reconcile Kubernetes Service resources into cloud load balancer resources.
Therefore, in this scenario, the failing component is the Cloud Controller Manager, which is the Kubernetes control plane component that interfaces with the cloud provider to provision external load balancers and update the Service status.
NEW QUESTION # 189
Which of the following will view the snapshot of previously terminated ruby container logs from Pod web-1?
Answer: D
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 # 190
In a cloud native world, what does the IaC abbreviation stands for?
Answer: B
NEW QUESTION # 191
What do Deployments and StatefulSets have in common?
Answer: D
Explanation:
Both Deployments and StatefulSets are Kubernetes workload controllers that manage a set of Pods created from a Pod template, meaning they manage Pods based on an identical container specification (a shared Pod template). That is why A is correct. In both cases, you declare a desired state (replicas, container images, environment variables, volumes, probes, etc.) in spec.template, and the controller ensures the cluster converges toward that state by creating, updating, or replacing Pods.
The differences are what make the other options incorrect. OnDelete update strategy is associated with StatefulSets (it's one of their update strategies), but it is not a shared, defining behavior across both controllers, so B is not "in common." Ordered, graceful deployment and scaling is a hallmark of StatefulSets (ordered pod creation/termination and stable identities) rather than Deployments, so C is not shared. Sticky identity per Pod (stable network identity and stable storage identity per replica, commonly via StatefulSet + headless Service) is specifically a StatefulSet characteristic, not a Deployment feature, so D is not common.
A useful way to think about it is: both controllers manage replicas of a Pod template, but they differ in semantics. Deployments are designed primarily for stateless workloads and typically focus on rolling updates and scalable replicas where any instance is interchangeable. StatefulSets are designed for stateful workloads and add identity and ordering guarantees: each replica gets a stable name (like db-0, db-1) and often stable PersistentVolumeClaims.
So the shared commonality the question is testing is the basic workload-controller pattern: both controllers manage Pods created from a common template (identical container spec). Therefore, A is the verified answer.
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NEW QUESTION # 192
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