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Linux Foundation KCNA Real Exam Questions Guaranteed Updated Dump from Actual4Exams
Linux Foundation KCNA exam is a hands-on exam that requires candidates to demonstrate their practical skills in Kubernetes and cloud-native technologies. It is a challenging exam, but it is also highly rewarding for those who pass it. By earning the KCNA certification, candidates can demonstrate to employers that they have the skills and knowledge required to succeed in this fast-growing field.
NEW QUESTION # 120
Continuous delivery is ______.
- A. Manually deploying the code
- B. Automatically deploying code to [container or server] environment
- C. Coding, Building and Testing the code
Answer: B
NEW QUESTION # 121
Which organizational persona creates Service Level Agreements 'SLA', Service Level Objectives 'SLO', and Service Level Indicator 'SLI'?
- A. Security and Compliance Engineer
- B. Site Reliability Engineer (SRE)
- C. Developer
- D. DevOps
- E. DevSecOps
Answer: B
Explanation:
SREs create SLAs, SLOs, and SLIs to define and implement standards for application and infra-structure reliability.
NEW QUESTION # 122
What command can you use to get documentation about a resource type from the command line?
- A. kubectl api-resources
- B. kubectl explain
- C. kubectl get
- D. kubeadm get-resource
Answer: B
Explanation:
https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands#explain
NEW QUESTION # 123
Which control plane component is responsible for scheduling pods?
- A. kube scheduler
- B. kube-proxy
- C. kube api-server
- D. kubelet
Answer: A
Explanation:
https://kubernetes.io/docs/concepts/overview/components/
NEW QUESTION # 124
You have a Kubernetes deployment that runs an application with multiple replicas. When a Pod fails, you need to ensure that the deployment automatically creates a replacement Pod. Which Kubernetes API resource is responsible for this functionality?
- A. pod
- B. Service
- C. Deployment
- D. StatefulSet
- E. ReplicaSet
Answer: E
Explanation:
The *ReplicaSet• is responsible for ensuring that the desired number of Pods are running for a deployment. It monitors the Pods and automatically replaces failed Pods. Option 'A' is incorrect because services are for exposing applications, not for managing replicas. Option 'C' is incorrect because Pods are individual containers. Option 'D' is incorrect because Deployments use ReplicaSets to manage their replicas. Option 'E' is incorrect because StatefulSets are for managing Pods with unique identities and persistent storage, which is not required in this scenario.
NEW QUESTION # 125
Which Kubernetes resource creates Kubernetes Jobs?
- A. Task
- B. JobFactory
- C. CronJob
- D. JobDeployment
Answer: C
Explanation:
https://kubernetes.io/docs/concepts/workloads/controllers/cron-jobs/
NEW QUESTION # 126
You're using a cloud provider's managed Kubernetes service with different pricing tiers for nodes. You want to optimize costs by using a mix of node types based on your workload needs. Which of the following is the most appropriate approach?
- A. Utilize node pools with different node types and configure a node selector for deployments to target the appropriate pool.
- B. Configure a horizontal pod autoscaler (HPA) to automatically choose the optimal node type based on workload demands.
- C. Use only the most cost-effective node type for all deployments, regardless of their resource requirements.
- D. Use a third-party tool to analyze your cluster's resource utilization and recommend the best node types for each workload.
- E. Manually choose the node type for each deployment based on its resource requirements.
Answer: A,D
Explanation:
Using a mix of node types based on workload needs is a key cost optimization strategy. Node pools with different node types allow you to run resource-intensive workloads on powerful nodes and less demanding workloads on less expensive nodes. A node selector can be used to target specific pools for deployments. Third-party tools can analyze resource utilization and provide recommendations for node type assignments. Manually choosing node types for each deployment is inefficient and prone to errors. HPA is designed for scaling pods, not choosing node types.
NEW QUESTION # 127
What are the two major components of service mesh?
- A. Master plane and Data plane
- B. Control plane and Data plane
- C. Controller plane and User plane
- D. Master plane and User plane
- E. None of the options
Answer: B
Explanation:
https://istio.io/latest/about/service-mesh/
NEW QUESTION # 128
You need to create a Kubernetes service that exposes a TCP-based application on port 8080. You want the service to be accessible from external clients. Which type of service should you create?
- A. LoadBalancer
- B. NodePort
- C. ExternalName
- D. Headless
- E. ClusteriP
Answer: A
Explanation:
The *LoadBalancer• service type is the most suitable for exposing your TCP-based application on port 8080 to external clients. It will automatically create a load balancer in the cloud provider's infrastructure, allowing external access to your application. Option 'A' (ClusterlP) only allows access from within the cluster. Option 'C' (NodePort) exposes the service on a specific port on each node, making it accessible via the node's IP address. Option 'D' (ExternalName) is for exposing services that are already externally accessible using a DNS name. Option 'E' (Headless) is for services where you want to access Pods directly by their names, which is not the case here.
NEW QUESTION # 129
What is the name for the tool that manages communication between pods, injects a sidecar proxy container into each pod and directs network traffic through the proxy container?
- A. namespace
- B. Network policy
- C. Service
- D. Deployment
- E. Service mesh
Answer: E
NEW QUESTION # 130
Which of the following statements accurately describes the role of ArgoCD in GitOps?
- A. ArgoCD is a cloud-native storage solution for storing Kubernetes configurations.
- B. ArgoCD is a continuous integration and continuous delivery (CIICD) tool for building and testing applications.
- C. ArgoCD is a tool for managing Kubernetes secrets and sensitive data.
- D. ArgoCD is a container orchestration platform for managing Kubernetes deployments.
- E. ArgoCD is a GitOps engine that synchronizes your Kubernetes cluster with your Git repository, ensuring your desired state is maintained.
Answer: E
Explanation:
ArgoCD is a declarative GitOps engine that uses your Git repository as the single source of truth for your Kubernetes cluster's desired state. It monitors changes in the repository and automatically applies them to the cluster, ensuring consistency and reliability.
NEW QUESTION # 131
Which of the following components is part of the Kubernetes control panel
- A. Service Mesh
- B. kube-proxy
- C. Cloud control manager
- D. kubectl
- E. kubelet
Answer: C
Explanation:
https://kubernetes.io/docs/concepts/overview/components/
NEW QUESTION # 132
What framework allows developers to write code without worrying about the servers and operating systems they will run on?
- A. Docker
- B. Serverless
- C. Kubernetes
- D. Virtualization
Answer: B
NEW QUESTION # 133
Which of the following Kubernetes components is responsible for managing the lifecycle of Pods, including scheduling, creation, and deletion?
- A. Controller Manager
- B. etcd
- C. amserver
- D. kubectl
- E. Kubelet
Answer: A
Explanation:
The Kubernetes Controller Manager is responsible for managing the lifecycle of Pods. It monitors the state of Pods and ensures that they are running as intended. It also handles pod creation, deletion, and scaling based on the defined Deployment or ReplicaSet.
NEW QUESTION # 134
What kind of limitation cgroups allows?
- A. Server cpu and memory
- B. Prioritization
- C. Resource limiting
- D. Accounting
- E. Control
- F. None of the options
Answer: B,C,D,E
NEW QUESTION # 135
The Kubernetes API provides an interface for storing objects. Which of the following describes the type of objects stored by the Kubernetes API?
- A. ETCD
- B. REST
- C. Containers
- D. YAML
Answer: B
Explanation:
Kubernetes objects are RESTful objects.
NEW QUESTION # 136
You are deploying a web application that requires high availability. You have configured a Kubernetes Deployment with 3 replicas. However, you notice that when one pod restarts, it takes a significant amount of time for the application to become fully operational again. What Kubernetes feature could you use to minimize the downtime during pod restarts?
- A. Service
- B. Pod Disruption Budget
- C. DaemonSet
- D. StatefulSet
- E. Horizontal Pod Autoscaler
Answer: B
Explanation:
A Pod Disruption Budget (PDB) allows you to specify a minimum number of healthy pods that must be available at any given time. This helps prevent large-scale disruptions during rolling updates or pod restarts. By setting a PDB, you can ensure that your web application remains available during these events, minimizing downtime.
NEW QUESTION # 137
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