Read this free guide below with common Devops interview questions
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DevOps is a set of cultural changes, process improvements and tools that are aimed at increasing an organization's ability to deliver applications and services at high velocity. These are the top 20 DevOps interview questions and answers that you should know if you are looking to be a DevOps professional.
DevOps is a software engineering culture and practice that aims to unify software development and operations to reduce the time between committing changes to a project and the changes being placed into normal production, while ensuring high quality of the software.
Git is a distributed version control system, while SVN is a centralized version control system. Git allows multiple developers to work on the same code at the same time, using their local copies. SVN, on the other hand, relies on a central repository and developers must commit their changes to the central repository frequently.
Continuous integration is the practice of automatically building, testing, and integrating code changes into a shared repository multiple times a day. It helps prevent integration issues by detecting mistakes early and often, which makes it easier and cheaper to fix them.
Continuous delivery is the practice of automating the entire process of deliverables to a production environment safely and quickly, using automated testing and deployment. This helps reduce the time between deploying new features and delivering them to customers. Continuous delivery is often confused with continuous deployment.
Infrastructure as Code is the process of managing and provisioning infrastructure using code, like software development. This code can be version-controlled, tested, and deployed like application code, therefore helping manage infrastructure more efficiently, quickly, and accurately.
Docker is a containerization platform that bundles entire applications into containers, while Vagrant is a tool for building and managing virtual machine environments. Docker provides more lightweight and portable containers that can be run anywhere, while Vagrant provides complete virtual machine and is more geared towards development environments.
A container is a lightweight, standalone, and executable software package that includes all the necessary components to run an application. Containers are isolated from each other and from the host operating system, making them portable and easy to deploy.
Kubernetes is an open source container orchestration tool that automates the deployment, scaling, and management of containerized applications. It provides many features for managing containers at scale, including automatic load balancing, service discovery, and rolling updates.
Microservices is an architectural style for developing complex applications as a series of small, independent services that can communicate with each other using common APIs. Each service can be deployed, tested, and scaled independently, making it easier to maintain and adapt to changing business needs.
A CI/CD pipeline is a set of automated processes that enable developers to continuously build, test, and deploy code changes to a production environment. CI/CD pipelines help reduce the time and effort involved in software development, while also improving the quality of the software being produced.
Blue-green deployment is a release strategy that allows for the deployment of a new version of an application alongside the old one. Once the new version is deployed and tested, traffic is switched over to the new version, with the old version being turned off. In the event of a problem, traffic can be easily switched back to the old version.
Serverless computing is a cloud-based execution environment that enables the construction and running of applications without the need to manage or provision server infrastructure. This makes it easy to dynamically scale resources based on actual usage, and is a “pay for what you use” model.
A canary release is a deployment technique that enables a small subset of users to access a new feature or version of an application to test for any bugs or issues. Canary releases help detect problems early and minimize the impact of a bad release.
Chaos engineering is the discipline of experimenting on a software system in production to uncover weaknesses before they become major outages affecting millions of users.
These are only some of the DevOps interview questions and answers. A DevOps professional should have a thorough knowledge of software development, IT operations, and infrastructure, among other things.
DevOps is an approach to software engineering that emphasizes collaboration between the development and operations teams. It also involves the use of various tools and methodologies to automate and optimize the software development and delivery process. With the increased demand for DevOps professionals, it’s important to be well-prepared for the interview process. Here are some tips for getting ready:
By following these tips, you’ll be well-prepared for your DevOps interview and set yourself up for success.
While it's good to practice and prepare for an interview, giving overly rehearsed or memorized answers can come across as insincere. Aim to engage in a genuine conversation with the interviewer.
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