Kubernetes Interview Questions And Answers | Kubernetes Tutorial | Kubernetes Training | Edureka

Kubernetes Certification Training www.edureka.co/kubernetes-certification Stats Of Kubernetes Popularity in GitHub 388,100 Comments 28,519 Stars 680 Reviews 2.7 billion 60 percent 6525

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Basic Questions Basic Questions

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Kubernetes?01

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Kubernetes?01 Kubernetes is an open-source container management (orchestration) tool. It’s container management responsibilities include container deployment, scaling & descaling of containers & container load balancing.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How is Kubernetes related to Docker?02

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How is Kubernetes related to Docker?02 Docker is responsible for managing the lifecycle of containers and these containers are manually linked and orchestrated with Kubernetes

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Tell the difference between deploying applications on host and containers?03

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Container Orchestration?04

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Container Orchestration?04 Container Orchestration cab be thought of as an automated management with immense coordination with all the containers present in the cluster.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Why do we need Container Orchestration?05

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How is Kubernetes different from Docker Swarm?06

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the features of Kubernetes?07

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How does Kubernetes simplify Containerized Deployment08

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How does Kubernetes simplify Containerized Deployment08 A typical application have a cluster of containers across multiple hosts and these containers need to talk to each other. So, Kubernetes offers the required configurations for the user after the application state has been defined.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you know about Cluster in Kubernetes?09

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is the Google Container Engine?10

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is the Google Container Engine?10 A Google Container Engine also known as the GKE, is an open source container management system which is based on Kubernetes. This is mainly a container orchestration and management system for Dockers containers and clusters.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Heapster?11

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Heapster?11 Heapster supports Kubernetes natively on all the setups and is a cluster-wide aggregator of monitoring and event data.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Minikube?12

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Minikube?12 This is a tool that runs a single node Kubernetes cluster inside a virtual machine, simplifying it for the people to learn about it.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Kubectl?13

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Kubectl?13 Kubectl is the command line interface available to run the commands against Kubernetes clusters. So, it various features such as describing the command, operations, and providing examples for each operation.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Kubelet?14

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is a Kubelet?14 As, we all know that the basic unit of Kubernetes is the pod, and Kubelet is a process that runs all the pods present in the clusters.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by node in Kubernetes?15

Basic Questions Architecture Questions

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the different components of Kubernetes architecture?16

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by KUBE proxy?17

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by KUBE proxy?17 Kube-proxy can perform simple TCP/UDP packet forwarding across backend network service and is present on every node. It is a network proxy which reflects the services as configured in kubernetes API on each node.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you brief on the working of Master node?18

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is the role of kube - scheduler and kube - apiserver?19

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What is the role of kube - scheduler and kube - apiserver?19 Kube-scheduler is responsible for distribution and management of workloads and the Kube-api-server validates and configures data for the API objects such as the pods, services etc.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you know about Kubernetes Controller Manager?20

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you know about Kubernetes Controller Manager?20 Controller Manager is daemon that embeds controllers. It basically does namespace creation and garbage collection

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you elaborate about the working of ETCD?21

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you elaborate about the working of ETCD?21 Provides reliable datastore through distributed locking mechanism, writes barriers and ensure that leader is sending heartbeats periodically.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the different types of services used?22

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How can you achieve load balancing in Kubernetes?23

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How can you achieve load balancing in Kubernetes?23 Load-balancer configuration depends upon the cloud provider. Few cloud providers allow to configure your own IP.Just incase IP is not specified then a temporary IP is assigned.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you elaborate on Ingress Networks in Kubernetes?24

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand about cloud controller manager in Kubernetes?25

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand about cloud controller manager in Kubernetes?25 Cloud controller manager helps abstracting the cloud specific code from the core kubernetes specific code.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Container Resource Monitoring?26

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Container Resource Monitoring?26 Monitors the kubernetes cluster environment is much different from regular client-server architecture.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you tell the difference between Replica Set & Replication Controller27

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Can you tell the difference between Replica Set & Replication Controller27 Both of them use different types of selectors to replicate the pods. So, Replica Set uses Set-Based selectors while replication controllers use Equity-Based selectors

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Headless Service?28

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by Headless Service?28 When you don’t want load-balancing or a single cluster Ip, you use Headless service. So, this allows to reduce coupling to Kubernetes system.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the best security practices that you can follow?29

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What do you understand by federated clusters?30

Basic Questions Architecture Questions Scenario – Based Questions

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose there is a company handing various number of products and as it’s business expanded rapidly, their monolithic application cause problem. 31 How do you they shifted from monolithic to microservices, and deployed their containers in Kubernetes.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose there is a company handing various number of products and as it’s business expanded rapidly, their monolithic application cause problem. 31 How do you they shifted from monolithic to microservices, and deployed their containers in Kubernetes. Well, as microservices handle their own databases, moving from monolithic architecture to containerization, can make applications and databases from third-party servers to its own clusters on Docker and Kubernetes

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions A multinational company with a very much distributed system, with various number of data centers, virtual machines, and many employees working on various tasks. 32 How do you think can such company manage all the tasks in a consistent way with Kubernetes?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions A multinational company with a very much distributed system, with various number of data centers, virtual machines, and many employees working on various tasks. 32 How do you think can such company manage all the tasks in a consistent way with Kubernetes? A company with a distributed systems, may have many clusters associated with it. So, these clusters can communicate with each other via the cluster networking with the help of the suitable network plugins.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a situation, where a company wants to increase it’s efficiency and speed of it’s technological operations by maintaining minimal costs. 33 How do you think they will try to achieve this?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a situation, where a company wants to increase it’s efficiency and speed of it’s technological operations by maintaining minimal costs. 33 How do you think they will try to achieve this? The company can adopt the DevOps methodology by launching a CI/CD pipeline to reduce the deployment time. So, this will automatically increase the company’s rate to scale across various environments with container orchestration.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to revise it’s deployment methods and wants to build a platform which is much more scalable and responsive. 34 How do you think this company can achieve this to satisfy their customers?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to revise it’s deployment methods and wants to build a platform which is much more scalable and responsive. 34 How do you think this company can achieve this to satisfy their customers? The company can come up with a plan to use a cloud service such as AWS. So, with this the teams can be very autonomous in building and delivering their applications very quickly and frequently.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions A multinational company with a very much distributed system, with various number of data centers, virtual machines, and many employees working on various tasks. 35 How do you think can such company manage all the tasks in a consistent way with Kubernetes?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions A multinational company with a very much distributed system, with various number of data centers, virtual machines, and many employees working on various tasks. 35 How do you think can such company manage all the tasks in a consistent way with Kubernetes? I think the company should first move the services to Docker containers, and then they can orchestrate the containers to create efficiencies and manage them in a decentralized manner.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions It’s a known fact that the shift from monolithic to microservices solves the problem from development side, but increases the problem at deployment side. 36 How can you solve the problem at the deployment side?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions It’s a known fact that the shift from monolithic to microservices solves the problem from development side, but increases the problem at deployment side. 36 How can you solve the problem at the deployment side? Well, the problem at the deployment side can be solved by implementing the container orchestration platform at the data centres. So, this will not only increase the resilience, but will also improve the performance impact.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to optimize the distribution of it’s workloads, by adopting new technologies. 37 How can the company achieve this distribution of resources efficiently?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to optimize the distribution of it’s workloads, by adopting new technologies. 37 How can the company achieve this distribution of resources efficiently? To optimize the distribution of resources, the company can allocates the available resources into containers, so that these can be required when they are needed.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a car pooling company wants to increase their number of servers by simultaneously scaling their platform. 38 How do you think will the company deal with the servers and their installation?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a car pooling company wants to increase their number of servers by simultaneously scaling their platform. 38 How do you think will the company deal with the servers and their installation? The company can use the concept of containerization, and deploy clusters. Then, these clusters can use network plugins to perform the communication, and finally they can use the monitoring tools to monitor their actions.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a scenario where a company wants to provide all the required hand-outs to it’s customers having various environments. 39 How do you think they can achieve this critical target in a dynamic manner?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Consider a scenario where a company wants to provide all the required hand-outs to it’s customers having various environments. 39 How do you think they can achieve this critical target in a dynamic manner? They can use a cross-sectional team to build a web application using Kubernetes, so that they can achieve their target of getting their deployments into production within the minimum time-frame.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to run various workloads on different cloud infrastructure from bare metal to public cloud. 40 How will the company achieve this with the presence of different interfaces?

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Suppose a company wants to run various workloads on different cloud infrastructure from bare metal to public cloud. 40 How will the company achieve this with the presence of different interfaces? The company can target universal set of portable concepts across all the clouds by decomposing their infrastructure into microservices.

Basic Questions Architecture Questions Scenario – Based Questions Multiple-Choice Questions

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are minions Kubernetes cluster ?41 They are cartoon character They are work-horse / worker node of the cluster They are monitoring engine used widely in kubernetes They are docker container service.

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Kubernetes cluster data is stored in which of the following?42 Kube-apiserver Kubelet Etcd None of the above

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Which of them is a Kubernetes Controller?43 ReplicaSet Deployment Rolling Updates Both ReplicaSet and Deployment

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Which of the following are core Kubernetes objects44 Pods Services Volumes All of the above

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions Where does the Kube-proxy process run on?45 Master node Worker node Kubernetes Cluster Services None of the above

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the responsibilities of node controller?46 To assign a CIDR block to the nodes To maintain the list of nodes To monitor the health of the nodes All of the above

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What are the responsibilities of replication controller?47 Update or delete multiple pods with single command Kube-proxy Creates a new pod, if the existing pod crashes All of the above Helps to achieve the desired state

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions How to define a service without a selector?48 Specify the external name Specify an end point with IP Address and port Just by specifying the IP address Specifying the label and api-version

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions What did the 1.8 version of Kubernetes introduce?49 Taints and Tolerations Cluster level Logging Secrets Federated Clusters

Kubernetes Certification Training www.edureka.co/kubernetes-certification Kubernetes Interview Questions The handler is invoked by Kubelet to check if a container's IP address is open or not is?50 HTTPGetAction ExecAction TCPSocketAction None of the above

Features Kubernetes Docker Swarm Installation & Cluster Config Installation is very Complicated, but once setup cluster is very strong Installation is very simple, but cluster is not very strong GUI GUI is the Kubernetes Dashboard There is no GUI Scalability Highly scalable and scales fast Highly scalable and scales 5x fast than Kubernetes Auto scaling Kubernetes can do auto scaling Docker swarm cannot do auto scaling Load Balancing Manual intervention needed for load balancing traffic between different containers and pods Docker swarm does auto load balancing of traffic between containers in the cluster Rolling Updates & Rollbacks Can deploy rolling updates and does automatic roll backs Can deploy rolling updates, but n automatic rollbacks DATA Volumes Can share storage volumes only with the other containers in the same pod Can share storage volumes with a other container

Apply security updates to Environment regularly Defines strict policy/rules for resources Implement network segmentation Log everything on the production environment Restrict access to ETCD Implement Continuous Security Vulnerability Scanning Provide limited direct access to Kubernetes nodes Use images from authorized repository only Defines resources quota Enables auditing

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Kubernetes Interview Questions And Answers | Kubernetes Tutorial | Kubernetes Training | Edureka