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Linux Foundation KCNA Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Cloud Native Observability8%- Monitoring and Metrics
  • 1. Dashboards and Visualization (Grafana)
  • 2. Prometheus and Metrics Collection
- Tracing
  • 1. Distributed Tracing Concepts (OpenTelemetry, Jaeger)
- Logging
  • 1. Kubernetes Logging Architecture
  • 2. Centralized Logging (Fluentd, Elasticsearch, Kibana)
Topic 2: Cloud Native Application Delivery8%- GitOps
  • 1. GitOps Principles and Workflow
  • 2. Tools (Argo CD, Flux)
- CI/CD
  • 1. Artifact Management and Image Registries
  • 2. Continuous Integration and Continuous Delivery Pipelines
- Deployment Strategies
  • 1. Blue/Green, Canary, Rolling Updates
Topic 3: Kubernetes Fundamentals46%- Kubernetes Resources
  • 1. Configuration Resources (ConfigMaps, Secrets)
  • 2. Workload Resources (Pods, Deployments, StatefulSets, DaemonSets, ReplicaSets, Jobs, CronJobs)
  • 3. Networking Resources (Services, Ingress)
- Containers
  • 1. Container Runtime Interface (CRI)
  • 2. Basic kubectl Commands
  • 3. Container Images and Registries
- Kubernetes Architecture
  • 1. Worker Node Components (Kubelet, Kube-proxy, Container Runtime)
  • 2. Control Plane Components (API Server, etcd, Scheduler, Controller Manager)
- Kubernetes API
  • 1. API Resource Structure and Versioning
  • 2. Declarative Management (Manifests/YAML)
- Scheduling
  • 1. Resource Requests and Limits
  • 2. Taints and Tolerations
  • 3. Node Selection and Affinity
Topic 4: Container Orchestration22%- Service Mesh
  • 1. Service Mesh Concepts (Istio, Linkerd)
  • 2. Sidecar Pattern and Traffic Management
- Orchestration Fundamentals
  • 1. Self-healing and Rolling Updates
  • 2. Scheduling and Resource Management
  • 3. Service Discovery and Load Balancing
- Networking
  • 1. CoreDNS and Service Networking
  • 2. Kubernetes Networking Model
- Storage
  • 1. Storage Classes and Dynamic Provisioning
  • 2. Volumes, PersistentVolumes (PV), PersistentVolumeClaims (PVC)
- Security
  • 1. RBAC (Role-Based Access Control)
  • 2. Network Policies
  • 3. Pod Security Standards (Admission Control)
- Container Runtimes
  • 1. Docker, containerd, CRI-O
Topic 5: Cloud Native Architecture16%- Cloud Native Landscape
  • 1. CNCF Project Categories (Sandbox, Incubating, Graduated)
  • 2. CNCF Role and Governance
- Architecture Concepts
  • 1. Elasticity and Resilience
  • 2. Autoscaling (HPA, VPA, Cluster Autoscaler)
  • 3. Serverless and FaaS
  • 4. Microservices Architecture
- Infrastructure and Practices
  • 1. Immutable Infrastructure
  • 2. DevOps Practices and Culture
  • 3. Infrastructure as Code (IaC)

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Linux Foundation Kubernetes and Cloud Native Associate Sample Questions (Q17-Q22):

NEW QUESTION # 17
If a Pod was waiting for container images to download on the scheduled node, what state would it be in?

Answer: B

Explanation:
If a Pod is waiting for its container images to be pulled to the node, it remains in the Pending phase, so D is correct. Kubernetes Pod "phase" is a high-level summary of where the Pod is in its lifecycle. Pending means the Pod has been accepted by the cluster but one or more of its containers has not started yet. That can occur because the Pod is waiting to be scheduled, waiting on volume attachment/mount, or-very commonly- waiting for the container runtime to pull the image.
When image pulling is the blocker, kubectl describe pod <name> usually shows events like "Pulling image
..." and "Successfully pulled image ..." or failures like ImagePullBackOff/ErrImagePull. Even if the node has been assigned (scheduler has set spec.nodeName), the Pod can still be Pending while kubelet and the runtime perform preparation steps.
Why the other phases don't apply:
* Succeeded is for run-to-completion Pods that have finished successfully (typical for Jobs).
* Failed means the Pod terminated and at least one container terminated in failure (and won't be restarted, depending on restartPolicy).
* Unknown is used when the node can't be contacted and the Pod's state can't be reliably determined (rare in healthy clusters).
A subtle but important Kubernetes detail: status "Waiting" reasons like ImagePullBackOff are container states inside .status.containerStatuses, while the Pod phase can still be Pending. So, "waiting for images to download" maps to Pod Pending, with container waiting reasons providing the deeper diagnosis.
Therefore, the verified correct answer is D: Pending.
=========


NEW QUESTION # 18
Which of these components is part of the Kubernetes Control Plane?

Answer: B

Explanation:
The Kubernetes control plane is the set of components responsible for making cluster-wide decisions (like scheduling) and detecting and responding to cluster events (like starting new Pods when they fail). In upstream Kubernetes architecture, the canonical control plane components include kube-apiserver, etcd, kube-scheduler, and kube-controller-manager, and-when running on a cloud provider-the cloud- controller-manager. That makes option B the correct answer: cloud-controller-manager is explicitly a control plane component that integrates Kubernetes with the underlying cloud.
The cloud-controller-manager runs controllers that talk to cloud APIs for infrastructure concerns such as node lifecycle, routes, and load balancers. For example, when you create a Service of type LoadBalancer, a controller in this component is responsible for provisioning a cloud load balancer and updating the Service status. This is clearly control-plane behavior: reconciling desired state into real infrastructure state.
Why the others are not control plane components (in the classic classification): kubelet is a node component (agent) responsible for running and managing Pods on a specific node. kube-proxy is also a node component that implements Service networking rules on nodes. CoreDNS is usually deployed as a cluster add-on for DNS-based service discovery; it's critical, but it's not a control plane component in the strict architectural list.
So, while many clusters run CoreDNS in kube-system, the Kubernetes component that is definitively "part of the control plane" among these choices is cloud-controller-manager (B).
=========


NEW QUESTION # 19
How can a tls-type secret be created that holds the TLS certificate and its associated key using the kubectl command?

Answer: B

Explanation:
The kubectl create secret tls command is specifically designed for creating TLS secrets and requires the certificate and key to be provided using the --cert and --key flags.


NEW QUESTION # 20
Various Container Orchestrator Systems (COS)?

Answer: A,B,D


NEW QUESTION # 21
Which style of operations are preferred for K8S and cloud native applications?

Answer: A

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


NEW QUESTION # 22
......

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