{"id":72329,"date":"2019-08-05T07:40:51","date_gmt":"2019-08-05T07:40:51","guid":{"rendered":"https:\/\/www.whizlabs.com\/blog\/?p=72329"},"modified":"2024-04-04T10:58:15","modified_gmt":"2024-04-04T05:28:15","slug":"top-kubernetes-interview-questions","status":"publish","type":"post","link":"https:\/\/www.whizlabs.com\/blog\/top-kubernetes-interview-questions\/","title":{"rendered":"Top Kubernetes Interview Questions and Answers for 2024"},"content":{"rendered":"<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s2\">Kubernetes<\/span><span class=\"s1\"> has been noted quite widely in many circles related to the use of container technologies. This has been one of the reasons for large scale demand for Kubernetes interview questions. However, before looking for the best Kubernetes interview questions, you need to have a basic idea about Kubernetes itself. <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">In the most basic sense, Kubernetes can be described as a container orchestration tool. It is not dependent on vendors and is an open-source tool that provides a platform for automation of deployment, operations, and scaling of application containers across host clusters. The applications of Kubernetes have been associated with considerably lower costs for cloud computing expenses. Also, it has been a promising instrument in the simplification of architecture as well as operations.<\/span><\/p>\n<h3 class=\"p1\"><span class=\"s1\">Top Kubernetes Interview Questions and Answers<\/span><\/h3>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">With this basic information on Kubernetes, let us start this discussion on the most popular Kubernetes interview questions and answers. These are the most frequently asked in a Kubernetes interview by the interviewer. So, if you are preparing for a Kubernetes interview, these questions will help you ace the interview. Let\u2019s get ahead!<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">1. What is Kubernetes?<\/span><\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The first entry in this list of Kubernetes interview questions is probably one of the most basic ones. However, the majority of interviewers never skip this basic question.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Kubernetes (K8s) is an open source container orchestration platform which automates the process and eliminates the manual processes involved in containerized applications deployment and management. <\/span><a href=\"https:\/\/kubernetes.io\/\" target=\"_blank\" rel=\"noopener\"><span style=\"font-weight: 400;\">Kubernetes<\/span><\/a><span style=\"font-weight: 400;\"> was originally developed by Google and released as open source, now managed by Cloud Native Computing Foundation.\u00a0<\/span><\/p>\n<p>Know More about Kubernetes : <a href=\"https:\/\/www.whizlabs.com\/blog\/introduction-to-kubernetes\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.whizlabs.com\/blog\/introduction-to-kubernetes\/<\/a><\/p>\n<p><strong>2. How can we control the resource usage of POD?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are tools and services available to manage and optimize resource usage.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Resource requests and limits<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Resource quota and limit ranges for Namespaces<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">We can control the amount of memory and CPU per POD by setting <\/span><b>resource requests and limits<\/b><span style=\"font-weight: 400;\"> in the pod configuration file.<\/span><\/p>\n<p><strong>3. How do you perform maintenance activities on the Kubernetes node?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The maintenance on the kubernetes node can be done by draining the kubernetes node.<\/span><\/p>\n<p><b>kubectl cordon<\/b><\/p>\n<p><b>kubectl drain -ignore-daemon set<\/b><\/p>\n<p><span style=\"font-weight: 400;\">The following commands will be used to perform the maintenance on a single node.<\/span><\/p>\n<p><b>kubectl get nodes<\/b><\/p>\n<p><b>kubectl drain &lt;node name&gt;<\/b><\/p>\n<p><strong>4. What is the Pod Disruption Budget (PDB)?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">A Pod Disruption Budget (PDB) allows you to limit the disruption to the application when its pods need to be rescheduled. It will limit the number of pods of a replicated application that are down from the disruptions.\u00a0<\/span><\/p>\n<p><strong>5. How do you monitor the Kubernetes cluster?\u00a0<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The kubernetes (k8s) clusters can be monitored using a combination of Heapster to collect metrics and InfluxDB to store it, and Grafana\/Prometheus to present the collected data.<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">6. What is the relation between Docker and Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">This is one of the most common questions asked in a Kubernetes interview. You can find this question commonly in all the lists of Kubernetes interview questions. The candidate should answer this question as Docker is a platform used for lifecycle management of containers with a Docker image, responsible for building runtime containers. However, Kubernetes is the solution for communication between the individual containers. Therefore, Kubernetes helps in manual linking and orchestration of containers running on multiple hosts created using Docker. Let us move towards the next entry in Kubernetes interview questions.<\/span><\/p>\n<p><strong>7. What is a node in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">In Kubernetes, the node is a worker machine. It can be a physical machine or a Virtual machine (VM). A node can have multiple pods.<\/span><\/p>\n<p><strong>8. What is the use of Kube-scheduler?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The Kube scheduler is a kubernetes controller on the control plane that is responsible for assigning the pods to nodes. <\/span><\/p>\n<p><strong>9. What are daemon sets in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">A Daemonset is used to ensure that all the eligible nodes run a copy of some or all of the desired pods. If a new node is added to the kubernetes cluster, a new pod will be added to the newly created node.<\/span><\/p>\n<p><strong>10. What is a cluster IP in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The cluster IP is virtual IP assigned by the kubernetes to a service. Using the cluster IP, a service can be accessed from any node of the Kubernetes cluster.\u00a0<\/span><\/p>\n<p><strong>11. What are the various services available in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are 4 types of Kubernetes services available:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">ClusterIP<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">NodePort<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">LoadBalancer<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">ExternalName<\/span><\/li>\n<\/ul>\n<p><strong>12. What is kube-proxy in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Kube-proxy is a network proxy that runs on each node of the cluster. It watches API servers for pods\/services changes to maintain the network rules. <\/span><\/p>\n<p><span style=\"font-weight: 400;\"><strong>13. What is kubectl?<\/strong> <\/span><\/p>\n<p><span style=\"font-weight: 400;\">The Kubernetes command line tool, kubectl is an abbreviation for kubernetes control that allows to run commands against the clusters. Kubectl can be used to manage cluster resources, deploy applications and view logs.<\/span><\/p>\n<p><strong>14. What are the different types of pods available in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are two types of PODs are available:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Single Container Pod<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Multi Container Pod<\/span><\/li>\n<\/ul>\n<p><strong>15. What is Prometheus?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Prometheus is an open source tool used for system monitoring and alerting. This monitoring tool can help you to monitor the kubernetes cluster. <\/span><\/p>\n<p><strong>16. What is the difference between a replica set and a replication controller?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">The replica set and replication controller almost does the same. These are used to ensure that the desired number of replicas are running at a given time. The difference between replica set and the replication controller is the selector types. Replica set uses set based selectors and the replication controller uses equality-based selectors. <\/span><\/p>\n<p><strong>17. What is the difference between Equality Based selectors and Selector Based selectors?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Equality based selectors allow filtering by key and value.\u00a0 Set based selectors allow filtering keys according to a set of values. <\/span><\/p>\n<p><strong>18. How can we assign a static IP to the Kubernetes load balancer?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">apiVersion: v1\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">kind: Service\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">spec:\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0type: LoadBalancer\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0 \u00a0 \u00a0 \u00a0loadBalancerIP: 10.10.10.10\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u2026<\/span><\/p>\n<p><strong>19. What is minikube?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Minikube is a tool used to run a kubernetes cluster locally. Minikube is available for Linux, Windows and MacOS. It creates a virtual machine on the local system and creates a cluster with a single node.<\/span><\/p>\n<p><strong>20. List some of the important Kubernetes commands.<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">It\u2019s not possible to remember all the commands used to manage the kubernetes cluster. However, you may get a question from the interviewer to list some of the commands that are used frequently. Here is the list of commands that would be useful for the interview as well as for your day to day activities as a DevOps specialist.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pods<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pods &#8211;all-namespaces<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pod monkey -o wide<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pod monkey -o yaml<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl describe pod monkey<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl scale deployment\/POD_NAME &#8211;replicas=N<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl rollout history deployment\/DEPLOYMENT_NAME<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl rollout undo deployment\/DEPLOYMENT_NAME &#8211;to-revision=N<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get services<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl expose deployment\/dep_name &#8211;port=2001 &#8211;type=NodePort<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pv<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pvc<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get secrets<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl create secret generic &#8211;help<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl create secret generic mysql &#8211;from-literal=password=root<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get secrets mysql -o yaml<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl create configmap foobar &#8211;from-file=config.js<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get configmap foobar -o yaml<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get pods &#8211;all-namespaces |grep dns<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get ingress<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl expose deployment ghost &#8211;port=2368<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get daemonsets<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl describe<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl logs<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl exec<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get nodes &#8211;show-labels<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">kubectl get events<\/span><\/li>\n<\/ul>\n<p><strong>21. What are the secrets in Kubernetes?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Secrets is an object containing sensitive information such as keys or tokens.\u00a0 Secrets eliminates the need to store confidential information on our code. Secrets can be created independently of the pods that use them.<\/span><\/p>\n<p><strong>22. What is a federated cluster?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">Kubernetes Federation (KubeFed) is aggregating multiple kubernetes clusters and treating them as a single cluster to manage. We can make the clusters from various cloud platforms and use federation to control them as one.\u00a0<\/span><\/p>\n<p><strong>23. How do you run kubernetes locally?<\/strong><\/p>\n<p><span style=\"font-weight: 400;\">There are multiple options available to run kubernetes locally.\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Minikube<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Kind<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">CodeReady Containers(CRC)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Minishift<\/span><\/li>\n<\/ul>\n<p><b><\/b><strong><span class=\"s1\">24. What is the difference between Kubernetes and Docker Swarm?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">The third entry is also one of the top Kubernetes interview questions. The answer to this Kubernetes interview question would be a little detailed with a focus on different points. The difference points include installation and cluster configuration, GUI, auto-scaling, data volume, scalability, load balancing, logging and monitoring, and rolling updates and rollbacks. Here are the main points of difference between Kubernetes and Docker Swarm.<\/span><\/p>\n<p><a href=\"https:\/\/www.whizlabs.com\/docker-certified-associate\/practice-tests\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" class=\"size-full wp-image-72212 alignright\" src=\"https:\/\/www.whizlabs.com\/blog\/wp-content\/uploads\/2019\/07\/200X200-13.jpg\" alt=\"DCA Practice Tests\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.whizlabs.com\/blog\/wp-content\/uploads\/2019\/07\/200X200-13.jpg 200w, https:\/\/www.whizlabs.com\/blog\/wp-content\/uploads\/2019\/07\/200X200-13-150x150.jpg 150w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/a><\/p>\n<ul class=\"ul1\" style=\"text-align: justify;\">\n<li class=\"li1\"><span class=\"s1\">Kubernetes has a complicated setup with the assurance of a robust cluster while Docker Swarm is easier to set up but without a robust cluster. <\/span><\/li>\n<li class=\"li1\"><span class=\"s1\">The scalability of Docker Swarm is five times faster than Kubernetes. Kubernetes provides a dashboard as GUI while Docker Swarm does not have any GUI. <\/span><\/li>\n<li class=\"li1\"><span class=\"s1\">Kubernetes is capable of auto-scaling while Docker Swarm cannot. However, Kubernetes needs manual intervention for load balancing of traffic as compared to the automatic load balancing in Docker Swarm. <\/span><\/li>\n<li class=\"li1\"><span class=\"s1\">Kubernetes has integrated tools for logging and monitoring, unlike Docker Swarm, which needs third party tools for the same. <\/span><\/li>\n<li class=\"li1\"><span class=\"s1\">Kubernetes is limited in term of data volumes as it can share storage with other containers in the same pod while Docker swarm could share storage volumes with other containers easily. <\/span><\/li>\n<li class=\"li1\"><span class=\"s1\">The final point is the ability of Kubernetes to deploy rolling updates and automatic rollbacks. On the other hand, Docker Swarm could deploy rolling updates but does not have the ability for automatic rollbacks.<\/span><\/li>\n<\/ul>\n<p><b><\/b><span class=\"s1\"><strong>25. What is Container orchestration?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">The answer to another one of the frequently asked Kubernetes interview questions shall be based on an example. If there are around 8 or 10 microservices for an application, and each of them is placed in separate containers, it would create obstacles for communication. Therefore, container orchestration becomes mandatory in such cases. Orchestration helps in enabling all services in individual containers to work in unison for accomplishing goals of a single server.<\/span><\/p>\n<p style=\"text-align: justify;\"><strong>Note:<\/strong> If you&#8217;re aspiring to become a Kubernetes Certified Administrator? Start your preparation for the <a href=\"https:\/\/www.whizlabs.com\/blog\/certified-kubernetes-administrator-exam-preparation\/\" target=\"_blank\" rel=\"noopener\">Kubernetes Certified Administrator<\/a> exam.<\/p>\n<p><b><\/b><strong><span class=\"s1\">26. What are the notable features of Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">The coverage of best Kubernetes interview questions would also include \u201cWhat are the notable features of Kubernetes\u201d? You can point out the distinct features of automated scheduling, horizontal scaling, load balancing and self-healing capabilities as well as automated rollouts and rollbacks. <\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">27. How can Kubernetes help in deployment with containers?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><strong><span class=\"s3\">Answer: <\/span><\/strong><span class=\"s1\">Another mention in Kubernetes interview questions is \u201cHow can Kubernetes help in deployment with containers\u201d? The answer to this question would refer back to the basic objective of Kubernetes. As an orchestration tool, Kubernetes helps a cluster of containers in an application running on multiple hosts to communicate with each other. Kubernetes does not depend on the type of cloud and could be implemented on a public or private cloud. Furthermore, it is also functional in monitoring, scaling, and load balancing of containers, which makes it the best choice for simple containerized deployment.<\/span><\/p>\n<blockquote>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\"><i>Whatever be the technology, you may come across the myths associated with that. To uncover the myths and facts behind them, read out our previous article on <\/i><a href=\"https:\/\/www.whizlabs.com\/blog\/interesting-kubernetes-facts\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kubernetes Myths and Facts<\/a><i>.<\/i><\/span><\/p>\n<\/blockquote>\n<p><b><\/b><span class=\"s1\"><strong>28. Can you explain clusters in Kubernetes?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Kubernetes helps in enforcing desired state management. This means that a particular configuration could be fed into cluster services, and then the cluster services have the privilege to execute the configuration in the infrastructure. Deployment files have the configurations that need to be fed to the cluster services. When the deployment file is fed to the API, the clusters are required to figure the scheduling of pods in the environment and ensuring their execution. Therefore, Kubernetes cluster includes the API, worker nodes, and the Kubelet process run by the nodes. <\/span><\/p>\n<p><strong><span class=\"s1\">29. What is Google Container Engine?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">This is one of the top Kubernetes interview questions. The answer would be, Google Container Engine can be described as an open-source management platform tailored for Docker containers and clusters. It is based on Kubernetes and provides support for the clusters that run in public cloud services of Google. <\/span><\/p>\n<p><strong><span class=\"s1\">30. What do you know about a node in Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">You would also get Kubernetes interview questions like this in your interview! The answer may go like, a node can be defined as the main worker machine in a Kubernetes cluster and is also known as minions. Nodes could be executed on a VM or a physical machine, and they provide the necessary services for running pods. The master in a Kubernetes system has the privileges for managing a node. <\/span><\/p>\n<p><strong><span class=\"s1\">31. What are the components in Kubernetes Architecture?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Do the latest Kubernetes interview questions focus on Kubernetes architecture like \u201cWhat are the components in Kubernetes Architecture\u201d? Of course, yes! And the response suggests that there are two major components known as the master node and the worker node. Each of the components, in turn, have individual components in them.<\/span><\/p>\n<blockquote><p>Also Read: <a href=\"https:\/\/www.whizlabs.com\/blog\/top-jenkins-interview-questions\/\" target=\"_blank\" rel=\"noopener noreferrer\">Top Jenkins Interview Questions<\/a><\/p><\/blockquote>\n<p><strong><span class=\"s1\">32. How does the master node work in Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">The answer to the question would be that the master node controls the nodes having the containers. The containers are placed inside pods, and each pod may have different containers. The pods can be deployed through the command line interface or user interface. Following that, the pods are scheduled on the nodes, and then pods are allocated to the nodes based on resource requirements.<\/span><\/p>\n<p><strong><span class=\"s1\">33. What is the Kubernetes controller manager?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Another latest Kubernetes interview question is on the Kubernetes controller manager. The controller manager works as a daemon that is used for embedding controllers and garbage collection as well as namespace creation. It helps in running multiple controller processes on the master node albeit compiled together for running as a single process.<\/span><\/p>\n<p><strong><span class=\"s1\">34. What are different types of controller manager?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">You can find Kubernetes architecture interview questions such as \u201cWhat are different types of controller manager?\u201d The notable controller managers that can run on the master node are node controller, service account and token controller, endpoints controller, and replication controller.<\/span><\/p>\n<p><strong><span class=\"s1\">35. What is etcd?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">etcd is a distributed key-value store that can be helpful for coordination between distributed work. It is responsible for the storage of configuration data of Kubernetes cluster and represents the state of the cluster at a specific time. <\/span><\/p>\n<blockquote>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\"><i>Want to know more about Kubernetes? Check out some <\/i><a href=\"https:\/\/www.whizlabs.com\/blog\/interesting-kubernetes-facts\/\" target=\"_blank\" rel=\"noopener noreferrer\">interesting Kubernetes facts<\/a><i>\u00a0now!<\/i><\/span><\/p>\n<\/blockquote>\n<p><strong>36. What are the services in Kubernetes?<\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">You can also get Kubernetes interview questions asking about the services in Kubernetes. You can point out to the services such as node port, cluster IP, external name creation, and load balancer.<\/span><\/p>\n<p><a href=\"https:\/\/www.whizlabs.com\/docker-certified-associate\/online-course\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img decoding=\"async\" class=\"size-full wp-image-72238 aligncenter\" src=\"https:\/\/www.whizlabs.com\/blog\/wp-content\/uploads\/2019\/04\/docker_OC_banner-1.gif\" alt=\"Docker Certification Online Course\" width=\"728\" height=\"90\" \/><\/a><\/p>\n<p><b><\/b><span class=\"s1\"><strong>37. What is a load balancer in Kubernetes?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">It is also an important interview question commonly asked in a Kubernetes interview. You can state that load balancer is a method for exposing service, and two types of load balancers can be used in Kubernetes. The two-load balancer includes external load balancer and internal load balancer. <\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>38. What is the role of cloud controller manager?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: To answer this question, y<\/span><span class=\"s1\">ou can state that the cloud controller manager is an essential component for persistent storage, the abstraction of cloud-specific code from core Kubernetes code, and network routing.<\/span><\/p>\n<p><span class=\"s1\"><strong>39. Do you know anything about container resource monitoring?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Users need to have a clear impression of the performance of an application and resource utilization at different levels such as container, services, pod, and the cluster itself. Kubernetes provides these functionalities and so container resource monitoring is used. <\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">40. What is a headless service?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">A can also come across a different question in your Kubernetes interview such as \u201cWhat is a headless service?\u201d. Headless service can be described as any other normal service, albeit without any cluster IP.<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">41. What are the recommended security measures for Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: It could be t<\/span><span class=\"s1\">he next important question in your Kubernetes interview. The security measures include restriction of access to etcd, implementing regular security updates to the environment, implementation of continuous scanning for security vulnerabilities. Definition of strict resource policies, implementing network segmentation, the definition of resource quota, support for auditing, and using images from the authorized repository are also valid security measures. <\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>42. Do you know anything about Kube-proxy?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">The answer to this question would be that Kube-proxy is a network proxy that imitates the services with their configuration noted in Kubernetes API on each node. <\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>43. What is Ingress network?<\/strong> <\/span><\/p>\n<p class=\"p4\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Ingress network can be described as a collection of rules that allows permission for connections into the Kubernetes cluster.<\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>44. How is replica set different from replication controller?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">You can say that the point of difference is in the use of selectors for replicating pods. Set-based selectors are applied in the replica set, and equity-based selectors are applied in replication controllers. <\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>45. Do you know about federated clusters?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: To demonstrate your knowledge about the federated cluster, y<\/span><span class=\"s1\">ou can state that federated clusters help in managing multiple Kubernetes clusters as a single cluster.<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">46. How can a company with distributed systems manage tasks consistently with Kubernetes?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Scenario-based Kubernetes interview questions such as \u201cHow can a company with distributed systems manage tasks consistently with Kubernetes?\u201d can also appear in your Kubernetes interview. The response would be that Kubernetes can be used for customization of scheduling architecture and gain support for multiple container formats.<\/span><\/p>\n<blockquote>\n<p style=\"text-align: justify;\">Preparing for a DevOps interview? Here we bring <a href=\"https:\/\/www.whizlabs.com\/blog\/top-devops-interview-questions\/\" target=\"_blank\" rel=\"noopener noreferrer\">Top DevOps Interview Questions<\/a>\u00a0with detailed answers that will help you crack the interview!<\/p>\n<\/blockquote>\n<p><b><\/b><strong><span class=\"s1\">47. How can a company improve efficiency and speed of technical operations with minimal costs?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: This can be among a<\/span><span class=\"s1\">nother scenario-based Kubernetes interview questions in your interview. The response can imply suggestions to work on a CI\/CD pipeline followed by working in the cloud and then scheduling of containers on a cluster. Kubernetes can help in the orchestration of the clusters, thereby reducing deployment time and better speed in different environments.<\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>48. How can a company deal with a monolithic codebase issue?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><strong><span class=\"s3\">Answer: <\/span><\/strong><span class=\"s1\">The answer to this question would cover the transition of the monolithic codebase to a microservice design so that different microservices can be classified as containers. Then Kubernetes could be used for deploying and orchestrating the containers. <\/span><\/p>\n<p><b><\/b><span class=\"s1\"><strong>49. How can a company ensure optimal distribution of resources?<\/strong> <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Kubernetes helps in the effective distribution of resources by allocating the resources that are used by a particular application.<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">50. Which of the following stores Kubernetes cluster data?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Multiple-choice Kubernetes questions can also be commonly observed in a Kubernetes interview, such as \u201cWhich of the following stores Kubernetes cluster data\u201d? The options may be \u201cKube-API server\u201d, \u201cKubelet,\u201d \u201cETCD,\u201d and \u201cNone of the above.\u201d Here you can tick on \u201cETCD.\u201d<\/span><\/p>\n<p><b><\/b><strong><span class=\"s1\">51. Which ones are a core Kubernetes object?<\/span><\/strong><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s3\">Answer: <\/span><span class=\"s1\">Another multiple-choice Kubernetes interview question you can find in an interview is \u201cWhich ones are a core Kubernetes object\u201d? And the options for this question can include \u201cPods,\u201d \u201cServices,\u201d \u201cVolumes,\u201d and \u201cAll of the above.\u201d<\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">In this case, the correct choice would be \u201c<strong>All of the above<\/strong>\u201d.<\/span><\/p>\n<blockquote>\n<p style=\"text-align: justify;\">Also Read: <a href=\"https:\/\/www.whizlabs.com\/blog\/kubernetes-myths-and-facts\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kubernetes Myths &amp; Facts<\/a> that will help you to understand the spreaded Kubernetes myths and the facts behind them.<\/p>\n<\/blockquote>\n<p><strong>52. How does Kubernetes manage container scaling?<\/strong><\/p>\n<p><span class=\"s3\">Answer: <\/span>Kubernetes manages container scaling by monitoring the resource usage of pods and automatically adjusting the number of replicas to ensure optimal performance. This can be done manually or through the use of horizontal pod autoscaling.<\/p>\n<p><strong>53. Can you describe the role of a Kubernetes node?<\/strong><\/p>\n<p>Answer: A Kubernetes node is a worker machine in a Kubernetes cluster that runs pods. Nodes are managed by the master components of the cluster and are responsible for running the pods and communicating with the master to report the status of the pods.<\/p>\n<h3 class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">Bottom Line<\/span><\/h3>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">Based on an illustration of interview questions that you can find commonly related to Kubernetes, it can be concluded that the process is intense. Learning is the foremost trick that you can try for succeeding at an interview for Kubernetes professionals. To enhance your Kubernetes knowledge and get fully prepared for the interview, we recommend you to go through our <a href=\"https:\/\/www.whizlabs.com\/learn-kubernetes-with-aws-and-docker\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kubernetes training course<\/a>. <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">However, you need to stay a step ahead by practicing the most common Kubernetes interview questions that you may be asked. A clear evaluation of the questions mentioned here can also help you gain confidence in responding to an interviewer. Furthermore, observing the Kubernetes interview questions and answers could also help you make the most of the interview time to show your skillset in Kubernetes. <\/span><\/p>\n<p class=\"p1\" style=\"text-align: justify;\"><span class=\"s1\">Go ahead and grab the opportunity!<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kubernetes has been noted quite widely in many circles related to the use of container technologies. This has been one of the reasons for large scale demand for Kubernetes interview questions. However, before looking for the best Kubernetes interview questions, you need to have a basic idea about Kubernetes itself. In the most basic sense, Kubernetes can be described as a container orchestration tool. It is not dependent on vendors and is an open-source tool that provides a platform for automation of deployment, operations, and scaling of application containers across host clusters. The applications of Kubernetes have been associated with 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N","author_link":"https:\/\/www.whizlabs.com\/blog\/author\/dharmalingam\/"},"uagb_comment_info":95,"uagb_excerpt":"Kubernetes has been noted quite widely in many circles related to the use of container technologies. This has been one of the reasons for large scale demand for Kubernetes interview questions. However, before looking for the best Kubernetes interview questions, you need to have a basic idea about Kubernetes itself. In the most basic sense,&hellip;","_links":{"self":[{"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/posts\/72329","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/comments?post=72329"}],"version-history":[{"count":19,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/posts\/72329\/revisions"}],"predecessor-version":[{"id":94397,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/posts\/72329\/revisions\/94397"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/media\/82478"}],"wp:attachment":[{"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/media?parent=72329"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/categories?post=72329"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.whizlabs.com\/blog\/wp-json\/wp\/v2\/tags?post=72329"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}