Kubernetes Interview Questions and Answers

Kubernetes Interview Questions and Answers –

1. What is Kubernetes?

Kubernetes is a container management system developed in Google Platform. Kubernetes aims to manage containerized applications across a variety of physical, virtual, and cloud environments. Google Kubernetes is a highly flexible container tool for continuously delivering even complex applications. Applications run on clusters of hundreds to thousands of individual servers

2. Why use Kubernetes?

Answer –

Kubernetes is used because:

Kubernetes can run on-premises bare metal, OpenStack, public clouds Google, Azure, AWS, etc. This helps you avoid vendor lock issues because it can use any vendor-specific APIs or services, except where Kubernetes provides an abstraction, for example, load balancers and storage. This will enable applications that need to be released and updated without any downtime. Kubernetes allows you to ensure that containerized apps run where and when you want, and helps you find the resources and tools you want to work on.

Read also – Setup of npm package storage on Linux 22.04 using Nexus Sonatype Repository

3. What are the features of Kubernetes?

Answer –

Features of Kubernetes are:

  1. automatic scheduling
  2. Self-healing abilities
  3. Automatic rollout and rollback
  4. Horizontal Scaling and Load Balancing
  5. Provides environmental stability for development, testing and production
  6. Infrastructure loosely coupled with each component that can function as a separate unit
  7. Provides high density of resource utilization
  8. Offers enterprise-ready features
  9. application-centric management
  10. Auto-Scalable Infrastructure
  11. You can create predictive infrastructure

4. Mention the types of OD controller managers

Answer –

The types of controller managers are: 1) Endpoint Controller, 2) Service Account Controller, 3) Node Controller, 4) Namespace Controller, 5) Replication Controller, 6) Token Controller.

Kubernetes Interview Questions and Answers

5) List the different services available in Kubernetes

Answer –

The various services available in Kubernetes are

  1. Cluster IP Service
  2. Load Balancer Service
  3. Node Port Service,
  4. 4) External Name Creation Service.

6) Explain node port

Answer –

Node port service is a fundamental way to get external traffic to your service. It opens a special port on all nodes and forwards network traffic sent to this port.

7) Define kubelet

Answer –

Kubelet is a service agent that controls and maintains Cluster PF pods by checking the pod specification using Kubernetes. Kubelet runs on each node and allows communication between the master node and slave nodes.

8) What are the disadvantages of Kubernetes?

Answer –

  1. Kubernetes dashboard not as useful as it should be
  2. Security is not very effective.
  3. It is too complex and can reduce productivity
  4. Kubernetes is more expensive than its alternatives.

9) What is kube-proxy?

Answer –

kube-proxy is an implementation of both a network proxy and a load balancer. It is used to support service abstraction used with other networking operations. It is responsible for directing traffic to the container based on the IP and port number.

10) What is the difference between Kubernetes and Docker Swarm?

The difference between Kubernetes and Docker Swarm is:

Kubernetes Docker Swarm Kubernetes provides an auto-scaling feature. is available. It offers a built-in load balancing technology. Process scheduling is done to maintain services while updating.

12) What is kubectl used for?

Answer –

Kubectl is a software for controlling Kubernetes clusters. CTL stands for Control, which is a command-line interface for passing commands to the cluster and managing Kubernetes components.

13) What is GKE?

Answer –

GKE or Google Container Engine is a management platform that supports clusters and Docker containers running within Google’s public cloud services.

14) Why is load balancer needed?

Answer –

A load balancer is needed because it gives a standard way to distribute network traffic among different services that run in the backend.

15) How to run Kubernetes locally?

Answer –

Kubernetes can be run locally using the minikube tool. It runs a single-node cluster in a VM (virtual machine) on a computer. Therefore, it provides the ideal approach for users who are just starting to learn Kubernetes.

16) What are the tools that are used for container monitoring?

Answer –

  1. The tools used for container monitoring are:
  2. hipster
  3. C Consultant
  4. Prometheus
  5. InfluxDB
  6. grafana

17) List the components of Kubernetes

Answer –

  1. Kubernetes has three components, they are:
  2. Add on
  3. node components
  4. master component

18) Define headless service

Answer –

Headless service is defined as a service that uses IP addresses, but instead of load balancing, backs up the associated pods.

Kubernetes Interview Questions and Answers

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Kubernetes Interview Questions and Answers

Mahesh Wabale
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