DevOps Interview Questions for Freshers (2026): 30 Questions with Answers

Short answer: DevOps interviews for freshers focus on the ideas and tools that get code from a developer’s machine to production reliably: what DevOps is and the CI/CD pipeline, version control with Git, containers with Docker, orchestration with Kubernetes, infrastructure as code (Terraform, Ansible), a cloud platform, and basic monitoring. Below are 30 common questions with short, clear answers. Pair them with the DevOps roadmap for freshers to see how the tools fit together.

DevOps fundamentals

1. What is DevOps?

DevOps is a culture and set of practices that bring development and operations together to deliver software faster and more reliably, through automation, continuous integration and delivery, and close collaboration.

2. What problem does DevOps solve?

It removes the slow, error-prone handoff between developers who write code and operations who run it, by automating building, testing and deployment and sharing responsibility for reliability.

3. What is CI/CD?

Continuous Integration means merging and automatically testing code changes often; Continuous Delivery/Deployment means automatically releasing those tested changes to staging or production.

4. What is a CI/CD pipeline?

An automated sequence that builds the code, runs tests, and deploys it. Tools like Jenkins, GitHub Actions or GitLab CI run these steps whenever code changes.

5. What is infrastructure as code (IaC)?

Managing servers and infrastructure through version-controlled configuration files instead of manual clicks, so environments are repeatable and reviewable. Terraform and Ansible are common tools.

6. What is the difference between continuous delivery and continuous deployment?

In continuous delivery, releases are automated up to a manual approval; in continuous deployment, every change that passes tests goes to production automatically.

Version control (Git)

7. What is Git?

A distributed version control system that tracks changes to code and lets teams collaborate. GitHub, GitLab and Bitbucket are hosting platforms for Git repositories.

8. What is the difference between Git merge and Git rebase?

Merge combines branches and keeps the branch history with a merge commit; rebase replays your commits on top of another branch for a linear history. Merge is safer for shared branches.

9. What is a pull request (or merge request)?

A request to merge one branch into another, used for code review and automated checks before the change is accepted.

10. What is a branching strategy?

An agreed way of using branches, such as feature branches merged into main, or Git flow with develop and release branches, so teams work without conflicts.

Containers and orchestration

11. What is Docker?

Docker packages an application and its dependencies into a container, a lightweight, portable unit that runs the same way on any machine.

12. What is the difference between a container and a virtual machine?

A VM virtualises a whole operating system and is heavy; a container shares the host OS kernel and packages only the app and its dependencies, so it is much lighter and faster to start.

13. What is a Docker image vs a container?

An image is the read-only template (built from a Dockerfile); a container is a running instance of an image.

14. What is a Dockerfile?

A text file with instructions to build a Docker image, such as the base image, files to copy, dependencies to install and the command to run.

15. What is Kubernetes?

Kubernetes (K8s) is an orchestration platform that runs, scales and manages containers across many machines, handling scheduling, networking, scaling and self-healing.

16. When do you need Kubernetes over plain Docker?

When you run many containers across multiple servers and need automatic scaling, load balancing, rolling updates and recovery. For a single small app, Docker alone is often enough. See Docker vs Kubernetes for more.

17. What is a pod in Kubernetes?

The smallest deployable unit in Kubernetes, wrapping one or more closely related containers that share networking and storage.

18. What are deployments and services in Kubernetes?

A deployment manages a set of identical pods and handles updates and scaling; a service gives those pods a stable network address and load-balances traffic to them.

Cloud, IaC and automation

19. Which cloud platforms should a DevOps fresher know?

At least one of AWS, Azure or Google Cloud. AWS has the largest market share, but the concepts transfer. See AWS vs Azure vs GCP for freshers to choose.

20. What is Terraform?

An infrastructure-as-code tool that provisions cloud resources from declarative configuration files, and can work across multiple cloud providers.

21. What is the difference between Terraform and Ansible?

Terraform provisions infrastructure (creating servers and networks); Ansible is mainly for configuration management (setting up and configuring software on existing servers). They are often used together.

22. What is Jenkins?

An open-source automation server widely used to build CI/CD pipelines, running build, test and deploy steps automatically on code changes.

23. What is a build artifact?

The packaged output of a build (such as a JAR, a Docker image or a zipped app) that moves through the pipeline and gets deployed.

24. What is the difference between declarative and imperative configuration?

Declarative says what the end state should be and the tool makes it so (Terraform, Kubernetes manifests); imperative lists the exact steps to run. DevOps favours declarative, idempotent configuration.

Reliability and monitoring

25. What is monitoring and observability?

Monitoring tracks the health of systems through metrics, logs and alerts; observability is the broader ability to understand what is happening inside a system from its outputs. Prometheus and Grafana are common tools.

26. What are blue-green and canary deployments?

Blue-green keeps two environments and switches traffic to the new one after testing; canary releases the change to a small percentage of users first, then widens it. Both reduce release risk.

27. What is a rollback?

Returning to the previous working version when a deployment causes problems. Good pipelines make rollbacks fast and safe.

28. What is load balancing?

Distributing incoming traffic across multiple servers or containers so no single one is overloaded, improving reliability and scale.

29. What is a microservices architecture?

Building an application as small, independent services that communicate over the network, instead of one large monolith. It suits containers and Kubernetes but adds operational complexity.

30. Do DevOps engineers need to code?

Yes, some. You do not build application features, but you write scripts and automation, so a scripting language (commonly Python or Bash) and comfort with configuration files are expected.

How to prepare

Build a tiny CI/CD pipeline yourself: put an app in Git, containerise it with Docker, and deploy it, ideally to a free cloud tier. Be ready to explain CI/CD, containers vs VMs, and infrastructure as code in your own words. Follow the DevOps roadmap for the full learning order and the tech interview preparation guide for interview structure.

Learn DevOps at TryCatch Classes

TryCatch Classes’ DevOps Training covers Git and GitHub, CI/CD with Jenkins, Docker and Kubernetes, Terraform and Ansible, and AWS, Azure and Google Cloud, with hands-on projects, resume building and interview preparation. Learn at our Borivali West classroom or live online, with a 100% placement guarantee.

Frequently asked questions

Are these DevOps questions enough for a fresher interview?

They cover the core areas freshers are asked about: CI/CD, Git, Docker, Kubernetes, infrastructure as code, cloud and monitoring. Combine them with a small hands-on project so you can speak from experience, not just definitions.

Do I need coding skills for DevOps?

Some. You will write scripts and automation (commonly Python or Bash) and work with configuration files, but you do not build application features like a developer.

Which should I learn first, Docker or Kubernetes?

Docker first. Containers are the foundation Kubernetes builds on, so understand images, containers and Dockerfiles before moving to orchestration.

Do I need to know all three clouds (AWS, Azure, GCP)?

No. Learn one well; the concepts transfer. AWS has the largest market share, but Azure and GCP teach the same fundamentals.

Cover image: photo by Kevin Ache on Unsplash.