Kubernetes Interview Questions

Checkout Vskills Interview questions with answers in Kubernetes to prepare for your next job role. The questions are submitted by professionals to help you to prepare for the Interview.

Q.1 How is Kubernetes different from Docker Swarm?
Kubernetes focuses on open-source and modular orchestration, offering an efficient container orchestration solution for high-demand applications with complex configuration. Docker Swarm emphasizes ease of use, making it most suitable for simple applications that are quick to deploy and easy to manage.
Q.2 How is Kubernetes different from Docker?
A fundamental difference between Kubernetes and Docker is that Kubernetes is meant to run across a cluster while Docker runs on a single node. Kubernetes is more extensive than Docker Swarm and is meant to coordinate clusters of nodes at scale in production in an efficient manner.
Q.3 How is Kubernetes related to Docker?
Kubernetes is most commonly used with Docker managed containers, although it doesn't strictly depend on it. Kubernetes defines a Container Runtime Interface (CRI) that container platforms must implement in order to be compatible. These implementations are colloquially known as "shims". This makes Kubernetes platform agnostic so that instead of Docker you're free to use other platforms with corresponding shims, such as CRI-O or KataContainers.
Q.4 What is a container deployment?
Container deployment is the act of pushing (or deploying) containers to their target environment, such as a cloud or on-premises server. ... For more dynamic, large-scale systems, you might deploy hundreds or even thousands of containers a day. They are designed to be spun up and down quickly depending on the application.
Q.5 What is Container Orchestration?
Container orchestration is the automation of much of the operational effort required to run containerized workloads and services. This includes a wide range of things software teams need to manage a container's lifecycle, including provisioning, deployment, scaling (up and down), networking, load balancing and more.
Q.6 What is the need for Container Orchestration?
Container orchestration automates the scheduling, deployment, networking, scaling, health monitoring, and management of containers. Containers are complete applications; each one packaging the necessary application code, libraries, dependencies, and system tools to run on a variety of platforms and infrastructure.
Q.7 What are the features of Kubernetes?
The features of Kubernetes includes: Automated Scheduling, Self-Healing Capabilities, Automated rollouts & rollback, Horizontal Scaling & Load Balancing, Offers environment consistency for development, testing, and production and Infrastructure is loosely coupled to each component can act as a separate unit.
Q.8 How does Kubernetes simplify containerized Deployment?
Kubernetes is an open source container orchestration platform that allows large numbers of containers to work together in congruence and reduces operational burdens. It enables simplified heterogeneous deployment of application from On-Prem to Cloud to Edge.
Q.9 What do you know about clusters in Kubernetes?
A Kubernetes cluster is a set of nodes that run containerized applications. Containerizing applications packages an app with its dependences and some necessary services. Kubernetes clusters allow containers to run across multiple machines and environments: virtual, physical, cloud-based, and on-premises.
Q.10 What is Google Container Engine?
Google Container Engine (GKE) is a cluster management and container orchestration system developed to run and manage Docker containers. GKE schedules containers into a cluster and then manages them automatically based on defined stipulations and requirements.
Q.11 What are the ways to deploy containers?
There are two ways to do this: Directly, with the pull command. Indirectly, during the container deployment process.
Q.12 What is Kubernetes?
Kubernetes is an open-source container orchestration platform that enables the operation of an elastic web server framework for cloud applications. Kubernetes can support data center outsourcing to public cloud service providers or can be used for web hosting at scale.
Q.13 What is Kubernetes in AWS?
Kubernetes is open source software that allows you to deploy and manage containerized applications at scale. Kubernetes manages clusters of Amazon EC2 compute instances and runs containers on those instances with processes for deployment, maintenance, and scaling.
Q.14 What is EKS?
Amazon Elastic Container Service for Kubernetes (EKS) is a cloud-based container management service that natively integrates with Kubernetes to deploy applications. With Amazon EKS, an enterprise can use Kubernetes without having install, operate or manage the container orchestration software.
Q.15 What is kind cluster in Kubernetes?
kind is a tool for running local Kubernetes clusters using Docker container “nodes”. kind was primarily designed for testing Kubernetes itself, but may be used for local development or CI.
Q.16 What is a Kubernetes cluster a group of?
A Kubernetes cluster is a set of node machines for running containerized applications. The cluster is the heart of Kubernetes' key advantage: the ability to schedule and run containers across a group of machines, be they physical or virtual, on premises or in the cloud.
Q.17 What are pods and clusters in Kubernetes?
A cluster is central to the basic architecture of Kubernetes: If you're running Kubernetes, you're running at least one cluster. A pod is a unit of replication on a cluster; A cluster can contain many pods, related or unrelated [and] grouped under the tight logical borders called namespaces.”
Q.18 What is Kubernetes cluster in Azure?
Kubernetes clusters are groups of resources that include one or more pods. Pods are groups of containers. The primary way to deploy Kubernetes clusters in the Microsoft Azure cloud is the Azure Kubernetes Service (AKS). AKS is a managed service that you can use to configure and manage your clusters.
Q.19 Does Kubernetes deploy containers?
Kubernetes, also known as K8s, is an open-source system for automating deployment, scaling, and management of containerized applications. It groups containers that make up an application into logical units for easy management and discovery.
Q.20 What is difference between Kubernetes and Jenkins?
Jenkins is an automated software testing tool for your app. In comparison, Kubernetes is a system for automating deployment, scaling, and management. In short, the entire orchestration of containerized applications.
Q.21 What is the difference between terraform and Kubernetes?
Kubernetes is a container orchestration platform that allows developers to manage clusters of containers like Docker containers, while Terraform is an open-source infrastructure-as-code software tool that provides developers with a consistent CLI workflow to manage hundreds of cloud services.
Q.22 What is the difference between Ansible and Kubernetes?
The differences between these two products are profound. Ansible is an IT automation tool that deploys software, configures systems, and organizes more complex IT functions such as rolling updates or continuous deployments. On the other hand, Kubernetes is a system designed to orchestrate Docker containers.
Q.23 How is Kubernetes used in DevOps?
Kubernetes smoothens the container tasks. It eases activities like canary deployment, rolling updates, and horizontal auto-scaling. It plays a major role in streamlining the development, testing as well as deploying pipelines in the DevOps Managed Services.
Q.24 What is Kubeadm and Minikube?
Kubeadm is a tool to get Kubernetes up and running on already existing machine. Minikube is a tool which will allow you to start locally single node Kubernetes cluster. This is usually done in a VM - minikube supports VirtualBox KVM and others. It will start for you the virtual machine and take care of everything.
Q.25 Is minikube a cluster?
Minikube is a lightweight Kubernetes implementation that creates a VM on your local machine and deploys a simple cluster containing only one node. Minikube is available for Linux, macOS, and Windows systems.
Q.26 Which is better kind or minikube?
Kind is another Kubernetes SIGs project but is quite different compared to minikube. As the name suggests it moves the cluster into Docker containers. This leads to a significantly faster startup speed compared to spawning VM. Creating a cluster is very similar to minikube's approach.
Q.27 What does master node in a Kubernetes cluster do?
Master nodes host the control plane aspects of the cluster and are responsible for, among other things, the API endpoint which the users interact with and provide scheduling for pods across resources. Typically, these nodes are not used to schedule application workloads.
Q.28 What is Kops Kubeadm?
kubeadm installs clusters on existing infrastructure; whereas, kops builds the EC2 instances for you, and can also build VPC, IAM, Security groups and a number of other features as well. If you need HA masters or manifest-based cluster management, then kops may also be your first choice.
Q.29 What is rancher K3s?
K3s is an official CNCF sandbox project that delivers a lightweight yet powerful certified Kubernetes distribution designed for production workloads across resource-restrained, remote locations or on IoT devices.
Q.30 What is scheduling in Kubernetes?
In Kubernetes, scheduling refers to making sure that Pods are matched to Nodes so that Kubelet can run them.
Q.31 What is purpose of Kubelet?
kubelet is an agent that runs on each node in the cluster. It makes sure that containers are running in a Pod. The kubelet takes a set of PodSpecs that are provided through various mechanisms and ensures that the containers described in those PodSpecs are running and healthy.
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