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The KCNA Exam Tests candidates' knowledge of Kubernetes, the leading container orchestration system, and related cloud-native tools such as Prometheus, Fluentd, and Istio. KCNA exam also covers topics such as containerization, microservices architecture, and cloud-native infrastructure. Candidates who pass the exam will be certified as Kubernetes and Cloud Native Associates, demonstrating their proficiency in cloud-native technologies and their ability to work on cloud-native projects.
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The Linux Foundation KCNA exam is designed to test the candidate's knowledge and understanding of Kubernetes and cloud-native technologies. It covers a range of topics such as deploying, managing, and scaling applications in Kubernetes, understanding Kubernetes architecture and components, and configuring Kubernetes networking and security. KCNA Exam also tests the candidate's knowledge of containerization technologies such as Docker and container orchestration tools like Helm.
NEW QUESTION # 130
What feature is used for selecting the container runtime configuration?
Answer: A
Explanation:
https://kubernetes.io/docs/concepts/containers/runtime-class/
NEW QUESTION # 131
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: E
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 # 132
You have a Kubernetes cluster with three worker nodes. Nodel has 8 CPU cores, Node2 has 4 CPU cores, and Node3 has 2 CPU cores. You deploy a pod with a resource request of 2 CPU cores. What is the likely order in which Kubernetes will attempt to schedule this pod on the available nodes?
Answer: D
Explanation:
Kubernetes typically attempts to schedule pods on nodes that have the most available resources to meet the pod's requests. In this scenario, Nodel has the highest CPU capacity, followed by Node2, and then Node3. The scheduler prioritizes nodes with more available resources to ensure optimal utilization and minimize potential resource contention among pods.
NEW QUESTION # 133
A ________ is an application running on kubernetes.
Answer: D
Explanation:
https://kubernetes.io/docs/concepts/workloads/
NEW QUESTION # 134
Which Kubernetes Service type exposes a service only within the cluster?
Answer: D
Explanation:
In Kubernetes, a Service provides a stable network endpoint for a set of Pods and abstracts away their dynamic nature. Kubernetes offers several Service types, each designed for different exposure requirements.
Among these, ClusterIP is the Service type that exposes an application only within the cluster, making it the correct answer.
When a Service is created with the ClusterIP type, Kubernetes assigns it a virtual IP address that is reachable exclusively from within the cluster's network. This IP is used by other Pods and internal components to communicate with the Service through cluster DNS or environment variables. External traffic from outside the cluster cannot directly access a ClusterIP Service, which makes it ideal for internal APIs, backend services, and microservices that should not be publicly exposed.
Option B (NodePort) is incorrect because NodePort exposes the Service on a static port on each node's IP address, allowing access from outside the cluster. Option C (LoadBalancer) is incorrect because it provisions an external load balancer-typically through a cloud provider-to expose the Service publicly. Option D (ExternalName) is incorrect because it does not create a proxy or internal endpoint at all; instead, it maps the Service name to an external DNS name outside the cluster.
ClusterIP is also the default Service type in Kubernetes. If no type is explicitly specified in a Service manifest, Kubernetes automatically assigns it as ClusterIP. This default behavior reflects the principle of least exposure, encouraging internal-only access unless external access is explicitly required.
From a cloud native architecture perspective, ClusterIP Services are fundamental to building secure, scalable microservices systems. They enable internal service-to-service communication while reducing the attack surface by preventing unintended external access.
According to Kubernetes documentation, ClusterIP Services are intended for internal communication within the cluster and are not reachable from outside the cluster network. Therefore, ClusterIP is the correct and fully verified answer, making option A the right choice.
NEW QUESTION # 135
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