Kubernetes Interview Questions and Answers
Kubernetes is used as a platform for automating direction, scaling, and program setup. Created by Google, it is currently managed by Cloud Indigenous Computing Foundation. It supports multiple programming paradigms, procedural, object-oriented, and functional programming. Our collection of Kubernetes Interview Questions shall help you to understand the basics of this language. Kubernetes intends to provide an efficient solution for systems by simplifying installation, scaling, and operations of app containers round clusters of hosts. It operates on a cluster mode to reach out to container programs. Most cloud hosting providers supply a Kubernetes-based infrastructure or platform for something (PaaS or even IaaS) in which Kubernetes may be set up as being platform-providing support.
| Kubernetes | |
|---|---|
| What is the latest version of Kubernetes? | 1.179th December 2019 |
| Who is the developer of Kubernetes? | Cloud-Native Computing Foundation |
| What language does Kubernetes use? | Golang |
| License | Apache License 2.0 |
Below are some Kubernetes interview questions which are vital for candidates whether they are a beginner, intermediate or expert.
Most Frequently Asked Kubernetes Interview Questions
A Kubernetes ClusterIP is the unique IP address that is assigned to each Kubernetes Service as soon as they are created.
A service in Kubernetes is defined as an abstraction that constitutes a logical set of pods running at a point in your cluster, providing the same functionality.
A deployment in Kubernetes is a resource object that provides a declarative update to the applications. A deployment enables you to describe an application's life cycle, like which images to use for the app, the number of pods to be present, and their way of getting updated.
| Kubernetes Pod | Kubernetes Deployment |
|---|---|
| This is a collection of containers and basic objects. All the containers of a pod lie within the same node. | This is a kind of controller in Kubernetes. All the containers. All the controllers provide a Pod Template for you to create one responsible for each of them. |
| It is not suitable for the production stage. | It is best suited for the production stage. |
| It has no rollout or rollback updates. | It has both rollout and rollback updates. |
| It does not monitor each stage of deployment. | It monitors each stage of the pod. |
A headless service in Kubernetes is one having a service IP returning the IPs of associated pods instead of performing load-balancing. This allows us to interact directly with pods instead of a proxy.
An Endpoint in Kubernetes is basically the list of addresses, both IP and port) of the endpoints that implement a Kubernetes service.
Technically, Load balancing is the procedure for efficiently distributing any network's traffic among multiple backend services. It is a very critical strategy for maximizing scalability and availability throughout the network. In Kubernetes, there are various choices for executing the load balancing of external traffic to pods.
The DNS or Domain Name System in Kubernetes is a process used for associating various types of information, such as IP Addresses with easy to remember names. Kubernetes DNS is set up automatically in the clusters to provide a secure and lightweight mechanism for service discovery.
The in-built service discovery in Kubernetes DNS allows applications to find and communicate with each other very quickly.
A Pod in Kubernetes is actually a group of one or more containers having shared storage/network settings and a standard specification for running the containers. It contains one or more application containers that are relatively tightly coupled and are executed on the same physical or virtual machine.
In Kubernetes, Labels are key or value pairs being attached to objects, such as pods. The labels are meant to be used for specifying the identifying attributes of the objects meaningful and relevant for the users. They do not directly imply these semantics on to the core system. Labels are also used for organizing and the selection of subsets of the objects. It can be attached to objects at the time of creation and can be subsequently added and modified at any time.