Are you preparing for a Kubernetes interview? Gain a competitive edge with our comprehensive guide, packed with expert tips and proven strategies to help you succeed. Master the key concepts, navigate tricky questions, and confidently showcase your knowledge. Get ready to ace your Kubernetes interview and secure your dream job in the world of container orchestration.
Google created the open-source Kubernetes technology, which is used to manage containers. It makes it simple to run, grow, and administer containerized applications across a network of computers. The primary purpose of Kubernetes is to simplify complicated distributed system administration so that applications can run well and reliably.
We’ve compiled a collection of the most common Kubernetes interview questions and answers to assist you in advancing your career. These Kubernetes interview questions and answers are both for beginners as well as professionals with some level of experience.
Kubernetes Interview Q&A for Beginners
Below are some basic Kubernetes interview questions and answers for beginners.
- What are some of Kubernetes’ advantages?
Kubernetes, a container-coordination technology, makes container management simple. We can meet client demands by launching apps more rapidly and consistently.
Here is a list of some of the best Kubernetes features:
- Timekeeping robots that roll back the clock
- Vertical development and self-healing are two examples of elements.
- What exactly is a Kubernetes cluster?
A Kubernetes cluster is a collection of nodes collaborating to run containerized programs in various cloud-based, physical, virtual, and on-premises environments and multiple devices. It makes it simple to maintain, migrate, and create applications.
- What exactly is the purpose of Kubernetes?
Kubernetes simplifies the operations required to start, manage, and grow containerized applications manually. They are monitored, orphaned ones are restarted, underutilized ones are shut down, and resources such as storage, memory, and CPU are automatically allocated as needed.
- How does Kubernetes function?
The easiest method to manage the life cycle of containerized programs on a big scale is to use a container orchestration system like Kubernetes. It automates the launch and scaling of several containers at once. Containers executing the same program are combined to form a replica. They help to distribute the weight of all the demands that arrive. Then, Kubernetes manages these groups of containers and ensures they function correctly.
- What distinguishes Docker Swarm from Kubernetes?
Docker Swarm is a container management tool that comes with Docker. Docker Swarm can only manage essential Docker containers. On the other hand, Kubernetes assists in managing considerably more complex software program containers. Kubernetes supports production environments with more users.
- What does “orchestrate” software mean?
Application administration software allows us to connect two or more programs. We will no longer have to plan, coordinate, and administer software by hand. Any orchestration method should strive to improve and simplify standard processes.
- What exactly is a namespace in Kubernetes?
The Kubernetes namespace is used when many people are working on numerous projects in various world regions. The namespace enables several users to share the cluster’s resources.
- How do groups collaborate?
Federated clusters are made up of multiple sets that collaborate as one.
- What is a Kubernetes pod ?
A Kubernetes pod is a container collection that runs on the same host. If we release single containers frequently, our container and the pod will be identical.
- What is the function of a Kubernetes node?
In Kubernetes, a node is a worker machine known as a minion. This node could be a virtual or physical machine. Each node has a service that runs pods and is managed by master components. Node services include things like kubelet and kube-proxy.
- What exactly is a Heapster?
We could monitor the container cluster using the Heapster. We can watch the entire collection and collect event data as a result. It comes with Kubernetes support.
- What exactly is a container collection?
Using a container cluster, we can build and control containers in an ever-changing environment. It is a collection of Compute Engine nodes or instances. Instead of running on cluster computers, the Container Engine hosts Kubernetes’ API server.
- What exactly is a kubelet?
A “kubelet” is the smallest component of a Kubernetes system. The kubelet is in charge of ensuring that all machines function correctly. A kubelet’s sole responsibility is to ensure that all containers in a particular set are operational.
- How should a Kubernetes scheduler be written?
Kubernetes’ default scheduler is kube-scheduler. It’s designed to create your own and use it instead if you like.
Some Scenario Based Kubernetes Interview Q&A
Here are some scenario-based Kubernetes interview questions and answers:
- How would you scale a Kubernetes operation?
You can alter the number of deployment copies in Kubernetes by using the Kubernetes API or the kubectl scale command. For example, you can use the kubectl scale deployment command to duplicate a deployment named “my-deployment” to three copies. “my-deployment” and “replicas = 3.”
- How, for example, would you install Kubernetes during a rolling update?
To perform a rolling update, alter the image tag of a release using the Kubernetes API or the kubectl set image command. To update the image of a deployment named “my-deployment” to the most recent version (“v2”), execute the command kubectl set image deployment/my-deployment my-container=my-image:v2.
- Consider the following: How would you determine why a pod isn’t functioning correctly?
Using the procedures below, you can repair a broken pod.
- To check out how the pod is doing, use the kubectl get pods command.
- To discover more about the pod’s state and any events or failures, use the kubectl describe pod pod-name> command.
- To inspect the pod’s files for errors, use the kubectl logs pod-name> command.
- Check that the cluster has the necessary CPUs and memory for the pod.
- Check that the pod’s configuration, which includes environment variables and container ports, is proper.
- If the pod crashes or fails to start, use the kubectl get events tool to investigate any cluster-related issues or failures.
- In Kubernetes, how would you publish a deployment as a service?
If you wish to provide a release as a service, create a service resource in Kubernetes that specifies how to access it. ClusterIP, NodePort, and LoadBalancer are just a few examples of services.
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Some Tough Kubernetes Interview Q&A
The following are Kubernetes interview questions and answers for experienced applicants.
- Explain Minikube.
The Minikube makes it simple to run Kubernetes on a local machine. The Minikube runs a Kubernetes cluster with a single node within a virtual machine.
- Explain Kubectl.
The Kubectl command-line tool is used to start and manage Kubernetes applications. Kubectl is particularly useful for creating, updating, and removing components and assessing cluster resources.GKE should be described.
GKE, or Google Kubernetes Engine, is a platform for managing and coordinating Docker container systems. We may also launch groups of containers inside the Google Public Cloud using GKE.
- What exactly is kube-proxy?
Every machine has the kube-proxy running. It can perform simple tasks such as TCP, UDP, and routing. The services of each node are displayed using the Kubernetes API.
- What components comprise a Kubernetes Master?
The controller manager, scheduler, API server, etc. are all components of the Kubernetes Master . The Kubernetes Master components run the Kubernetes cluster and manage it.\
- What does Kubernetes load balance mean?
Because of load balancing, we will be able to display services. In Kubernetes, load sharing may be accomplished in two ways:
Internal load balancing: This is used to divide the load throughout the pods and set them up correctly.
External load balancing: This method sends data from external loads to the backend pods.
24, What does a kube-scheduler do?
The kube-scheduler is in charge of assigning nodes to newly created pods.
25. How do you configure a static IP address on the Kubernetes load balancer?
Kubernetes Master assigns a new IP address.
When Kubernetes Master assigns a new IP address to the load balancer, we can update the DNS records to give it a static IP address.
Conclusion
Kubernetes has a wide range of features and parts for complicated use cases, such as networking, logging, monitoring, and storage management. It has become the standard for delivering and handling containerized applications in production environments because it can be scaled, flexible, and stable.
