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| Certification Vendor: | Linux Foundation |
|---|---|
| Exam Name: | Kubernetes and Cloud Native Associate |
| Exam Number: | KCNA |
| Passing Score: | 75% (approximately 45 out of 60) |
| Exam Price: | $250 USD |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 60 |
| Exam Duration: | 90 minutes |
| Exam Format: | Multiple Choice |
| Available Languages: | Japanese, English |
| Related Certifications: | CKA (Certified Kubernetes Administrator) CKAD (Certified Kubernetes Application Developer) CKS (Certified Kubernetes Security Specialist) |
| Sample Questions: | Linux Foundation KCNA Sample Questions |
| Exam Way: | Online, proctored exam |
| Pre Condition: | None. No prerequisites required. |
| Official Syllabus URL: | https://training.linuxfoundation.org/certification/kubernetes-cloud-native-associate |
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The KCNA Exam is a valuable credential for professionals who work with Kubernetes and other cloud-native technologies. It demonstrates to employers that the candidate has a deep understanding of these technologies and can apply them effectively in real-world situations. Additionally, the certification is recognized globally and can help professionals stand out in a competitive job market.
NEW QUESTION # 91
The Kubernetes project work is carried primarily by SIGs. What does SIG stand for?
Answer: B
Explanation:
In Kubernetes governance and project structure, SIG stands for Special Interest Group, so A is correct. Kubernetes is a large open source project under the Cloud Native Computing Foundation (CNCF), and its work is organized into groups that focus on specific domains-such as networking, storage, node, scheduling, security, docs, testing, and many more. SIGs provide a scalable way to coordinate contributors, prioritize work, review design proposals (KEPs), triage issues, and manage releases in their area.
Each SIG typically has regular meetings, mailing lists, chat channels, and maintainers who guide the direction of that part of the project. For example, SIG Network focuses on Kubernetes networking architecture and components, SIG Storage on storage APIs and CSI integration, and SIG Scheduling on scheduler behavior and extensibility. This structure helps Kubernetes evolve while maintaining quality, review rigor, and community-driven decision making.
The other options are not part of Kubernetes project terminology. "Software Installation Guide" and the others might sound plausible, but they are not how Kubernetes defines SIGs.
Understanding SIGs matters operationally because many Kubernetes features and design changes originate from SIGs. When you read Kubernetes enhancement proposals, release notes, or documentation, you'll often see SIG ownership and references. In short, SIGs are the primary organizational units for Kubernetes engineering and stewardship, and SIG = Special Interest Group.
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NEW QUESTION # 92
What is the default eviction timeout when the Ready condition of a node is Unknown or False?
Answer: B
Explanation:
The verified correct answer is D (Five minutes). In Kubernetes, node health is continuously monitored. When a node stops reporting status (heartbeats from the kubelet) or is otherwise considered unreachable, the Node controller updates the Node's Ready condition to Unknown (or it can become False). From that point, Kubernetes has to balance two risks: acting too quickly might cause unnecessary disruption (e.g., transient network hiccups), but acting too slowly prolongs outage for workloads that were running on the failed node.
The "default eviction timeout" refers to the control plane behavior that determines how long Kubernetes waits before evicting Pods from a node that appears unhealthy/unreachable. After this timeout elapses, Kubernetes begins eviction of Pods so controllers (like Deployments) can recreate them on healthy nodes, restoring the desired replica count and availability.
This is tightly connected to high availability and self-healing: Kubernetes does not "move" Pods from a dead node; it replaces them. The eviction timeout gives the cluster time to confirm the node is truly unavailable, avoiding flapping in unstable networks. Once eviction begins, replacement Pods can be scheduled elsewhere (assuming capacity exists), which is the normal recovery path for stateless workloads.
It's also worth noting that graceful operational handling can be influenced by PodDisruptionBudgets (for voluntary disruptions) and by workload design (replicas across nodes/zones). But the question is testing the default timer value, which is five minutes in this context.
Therefore, among the choices provided, the correct answer is D.
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NEW QUESTION # 93
Which of the following sentences is true about namespaces in Kubernetes?
Answer: B
Explanation:
The true statement is C: the default namespace exists when a new cluster is created. Namespaces are a Kubernetes mechanism for partitioning cluster resources into logical groups. When you set up a cluster, Kubernetes creates some initial namespaces (including default, and commonly kube-system, kube-public, and kube-node-lease). The default namespace is where resources go if you don't specify a namespace explicitly.
Option A is false because namespaces are not hierarchical; Kubernetes does not support "namespaces inside namespaces." Option B is false because within a given namespace, resource names must be unique per resource kind. You can't have two Deployments with the same name in the same namespace. You can have a Deployment named web in one namespace and another Deployment named web in a different namespace-namespaces provide that scope boundary. Option D is false because not all objects are namespaced. Many resources are cluster-scoped (for example, Nodes, PersistentVolumes, ClusterRoles, ClusterRoleBindings, and StorageClasses). Namespaces apply only to namespaced resources.
Operationally, namespaces support multi-tenancy and environment separation (dev/test/prod), RBAC scoping, resource quotas, and policy boundaries. For example, you can grant a team access only to their namespace and enforce quotas that prevent them from consuming excessive CPU/memory. Namespaces also make organization and cleanup easier: deleting a namespace removes most namespaced resources inside it (subject to finalizers).
So, the verified correct statement is C: the default namespace exists upon cluster creation.
NEW QUESTION # 94
You are running a distributed database service in Kubernetes. The database requires secure communication between its pods and external clients. What Kubernetes networking features can you leverage to achieve this?
Answer: A,D,E
Explanation:
The correct answers are A, D, and E. - A: Using a 'LoadBalancer' with TLS termination allows secure communication between external clients and the database service through an encrypted HTTPS connection. - D Implementing mutual TLS authentication between database pods and clients ensures that only authorized clients can access the database, further enhancing security. - E. Combining 'Services', 'Ingress', and TLS termination can provide comprehensive security for external access to the database service. This allows you to manage ingress traffic with
'Ingress' resources and secure the connection with TLS termination on the 'LoadBalancer' or ingress controller. While 'NetworkPolicies' can help control network traffic, they cannot directly enforce encryption. 'Custom network plugins' can implement specific encryption features, but they might require more complex configuration and integration. The best approach is to use a combination of Kubernetes features to achieve secure communication between pods and external clients.
NEW QUESTION # 95
Which kubectlcommand is useful for collecting information about any type of resource that is active in a Kubernetes cluster?
Answer: A
NEW QUESTION # 96
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