Kubernetes Interview Question and answers - 3S Technology

Orange Technomind 27-Sep-2019
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Kubernetes Interview Question and Answers
 
Given below is a comprehensive list of most important and frequently asked Kuberenetes Interview Question and Answers which you need to prepare to ace your interview in 2019.Prepare better with the best interview questions and answers with 3S Technology and boost your interview skills. Want to learn Kubernetes training in UK 3S Technology IT Training will help you, a best institute for Kubernetes Training & Courses using Online and Classroom mode in Chennai Get an in-depth knowledge on Kuberenetes and become an expert.
 
 
1.What is Kubernete?
It refers to a system that does automating and scaling as well as the management of containerized applications. It handles the grouping of containers, which provides application for the logical units for management as well as discovery.
 
 
2.How to use Kubernetes?
Kubernetes is an open-source toolkit designed to automate deploying, scaling, and operating application containers. Kubernetes provides a clustered environment to control containerized applications.
 
 
3.How would you say that Kubernetes related to Docker?
Docker is responsible for the management of the lifecycle of containers and these are manually linked and orchestrated with Kubernetes.
 
 
4.What Is Orchestration In Software?
Application or service orchestration is the process of integrating two or more applications and/or services collectively to automate a technique, or synchronize data information in real-time.
 
 
5.What is GKE in Kubernetes?
GKE stands for Google Kubernetes Engine. GKE is a management and an orchestration system that is used for Docker container and all the container clusters that basically run within the Google’s public cloud services. Google Kubernetes engine is based on Kubernetes.
 
 
6.What is a Namespace in Kubernetes?
Namespaces are supposed for use in environments with many customers unfolds throughout more than one teams, or tasks. Namespaces are a way to divide cluster resources among more than one uses (thru resource quota). In future versions of Kubernetes, items within the equal namespace may have the identical access manage rules through default.
 
 
7.What is a Node in Kubernetes?
A node is a worker machine in Kubernetes. It was previously known as a minion. A node may be a VM or physical system, relying on the cluster. Each node has the services essential to run pods and is controlled through the master components. The services on a node encompass Docker, kubelet and kube-proxy.
 
 
8.What is a cluster in Kubernetes?
A container cluster is the foundation of Container Engine where the kubernetes objects that represent your containerized applications all run on the top of a cluster.
 
 
9.What monitoring tools are popularly used in Kubernetes?
Tools like Heapster, Prometheus etc. is quite popular for monitoring Kubernetes. For measuring CPU and memory, Heapster is quite famous. It can be queries via REST API.
 
 
10.What are Daemon Sets?
The Daemon set is a set of pods that is run only once on a host. It can be used for host layer attributes like a network, host monitoring or the storage plugin or things, which you would not want to run more than once on a host.
 
 
11.What is Docker Swarm?
The docker Swarm is a clustering and scheduling tool for the Docker containers. In terms of Swarm, the IT administrators and developers would set up and manage a cluster of Docker nodes as a part of the single virtual machine.
 
 
12.Which process run on the Kubernetes master node?
Kube-apiserver is the process run on the Kubernetes master node
 
 
13.Which process runs on Kubernetes non-master node?
Kube-proxy is the process runs on Kubernetes non-master node
 
 
14.What are Kubernetes Controllers?
  1. Replicaset
  2. Deployment controller
 
15.What is the Role of Kube-scheduler?
kube-scheduler is responsible for to assign a node to newly created pods.
 
 
16.Name the Components that Interact with Kubernetes Node Interface?
The components which interacts with Kubernetes node interface are Kubectl, Kubelet, and Node Controller
 
 
17.Where Kubernetes cluster data is stored ?
Kubernetes cluster data is stored in etcd
 
 
18.What does the Nodes Status Contain?
Some of the following things would be the main components of the node status.
 
• Address
• Condition
• Capacity
• Info
 
 
19.What are PODS in KUBERNETES? 
A Kubernetes pod is a particular group of one or more containers, which are deployed, in the same host. Pod operates one level higher than the container. All containers in pod might be scheduled on the identical node. Container in a pod can easily communicate with other containers in the same pod and share the same resources, storage and local network.
 
 
20.What are the advantages of Kubernetes?
  1. Automated rollback
  2. Automated scheduling 
  3. Horizontal scaling
  4. Auto healing capabilities
 
21.What is Minikube?
Minikube is a tool that lets you easy use to run Kubernetes locally. It runs all the components of Kubernetes in a single node, usually a virtual machine, for development purposes. Minikube is available for Linux, macOS, and Windows systems.
 
 
22.What is Kubectl?
Kubectl is the command line interface tool to control Kubernetes clusters, from a control host or your workstation.
 
 
23.What is Kubelet?
Kubelet is the scheduler for Kubernetes running on each worker node of a Kubernetes cluster. It manages the POD lifecycle. It’s responsible for what is running on an individual machine.
 
 
24.What are Taints and Tolerations?
Taints are used to schedule a pod on a particular node.
Tolerations are added in the pod configuration to target the node.
 
 
25.What is Kubernetes Load Balancing?
Load Balancing is one of the most common and the usual ways of exposing the services.
There are two sorts of load balancing in Kubernetes and they may be:
Internal load balancer – This type of balancer automatically balances loads and allocates the pods with the required configuration.
External Load Balancer – This type of balancer directs the traffic from the external loads to backend pods.
 

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