---
title: DevOps Engineer Interview Questions & Answers (2026): CI/CD, Docker, K8s & Cloud
description: The DevOps engineer interview questions that get asked in 2026 — CI/CD, Docker, Kubernetes, infrastructure as code, monitoring and cloud — with clear answers and how to prepare.
url: https://usegreenroom.app/blog/devops-engineer-interview-questions
last_updated: 2026-06-19
---

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# DevOps engineer interview questions and answers

June 19, 2026 · 10 min read

![DevOps engineer interview questions and answers — cover from Greenroom, the AI mock interviewer](/assets/blog/devops-engineer-interview-questions-hero.webp)

DevOps interviews are wide — they span CI/CD, containers, orchestration, infrastructure as code, monitoring, cloud, and a strong dose of "how would you debug this in production?" The role is about reliability and automation, so interviewers probe both your tool knowledge and your judgment under failure. Here are the **DevOps engineer interview questions** that actually get asked.

## CI/CD

- What is CI/CD, and what's the difference between continuous delivery and deployment?
- Walk through a typical pipeline — build, test, deploy.
- Blue-green vs canary vs rolling deployments.
- How do you roll back a bad deploy safely?

## Containers & orchestration

- What is Docker, and an image vs a container?
- Docker vs a virtual machine.
- Core **Kubernetes** concepts — pods, deployments, services, ReplicaSets.
- How does Kubernetes handle scaling and self-healing?

![DevOps interview topics — CI/CD, Docker, Kubernetes, IaC, monitoring, cloud](/assets/blog/pool-system-design.webp)

DevOps rounds test pipelines, containers and how you reason about reliability.

## Infrastructure & cloud

- What is infrastructure as code (Terraform, Ansible)?
- Core cloud services (compute, storage, networking, IAM) on AWS/Azure/GCP.
- How do you manage secrets and configuration?
- What is load balancing and auto-scaling?

## Monitoring & troubleshooting

- Logging, metrics, and tracing — the three pillars of observability.
- How would you debug a service that's suddenly slow in production?
- What's your approach to an incident and a post-mortem?

**The core truth:** DevOps interviews reward *judgment under failure*, not just tool trivia. Anyone can list Kubernetes objects; the hire can reason calmly through "the deploy broke prod — what now?" out loud, step by step.

## How to prepare

The scenario and troubleshooting questions are conversational — you reason through failures aloud while the interviewer probes. Practise narrating your debugging approach. Greenroom runs spoken technical interviews that follow up on your reasoning and give feedback. Pair it with our backend and system design guides.

## Frequently asked questions

### What questions are asked in a DevOps interview?

DevOps interviews cover CI/CD (pipelines, deployment strategies like blue-green and canary, safe rollbacks), containers and orchestration (Docker images vs containers, Docker vs VMs, Kubernetes pods, deployments, services, scaling and self-healing), infrastructure as code and cloud services, secrets management, and observability and troubleshooting scenarios like debugging a slow production service.

### What is the difference between Docker and Kubernetes?

Docker is a containerization platform that packages an application and its dependencies into a portable image that runs as a container. Kubernetes is a container orchestration system that manages many containers across a cluster — handling scheduling, scaling, self-healing, networking and rolling updates. In short, Docker creates and runs containers; Kubernetes manages them at scale in production.

### What deployment strategies should I know for a DevOps interview?

Know rolling deployments (gradually replace old instances with new), blue-green (run two identical environments and switch traffic over, enabling instant rollback), and canary (release to a small percentage of users first, then expand if metrics are healthy). Be ready to explain the trade-offs and how each handles rollback when a deploy goes wrong.

### How should I prepare for a DevOps interview?

Learn the tools — CI/CD, Docker, Kubernetes, infrastructure as code, cloud and observability — but focus on judgment under failure, since scenario and troubleshooting questions carry the most weight. Practise narrating how you'd debug a broken deploy or a slow service out loud, ideally with a voice-based mock interview that follows up on your reasoning.

DevOps rounds reward judgment under failure, reasoned out loud. Greenroom runs spoken technical interviews that follow up on your reasoning and give feedback. Free to start.