DevOps Engineer Interview Questions by Company

A DevOps interview is about releasing changes safely and keeping a service healthy while it grows. Expect questions on how code reaches production, how you know something is wrong before a customer tells you, and what you did during an outage. A company with shops and warehouses asks about peak days; a bank asks about audit and access.

What a DevOps Engineer interview checks

• The path to production. What runs between a commit and a release, what stops a bad change, and how you roll back.
• Infrastructure as code. How environments are described in files, reviewed like code, and kept the same between test and production.
• Containers and scheduling. What a container is for, how a cluster decides where work runs, and what happens when a node dies.
• Seeing what is happening. Logs, metrics and traces, which alerts deserve to wake someone up, and which do not.
• Incidents and what follows. How you lead or support an incident, how you write it up without blame, and which change stops it happening again.

How to prepare

1. Be ready to draw one pipeline you ran, from commit to release, and point at the step you improved.
2. Prepare one outage story and one story about a release you stopped in time.
3. For each tool you name, know the problem it solved for you and one thing it does badly.
4. Read the company page below and think about what peak load, security and cost mean for that business.

Mistakes that cost the offer

• Listing tools without the problem each one solved.
• Describing an outage without saying how it was noticed.
• Forgetting cost: a design that works but nobody can afford to run.

The rounds of a DevOps Engineer interview, and what each one tests

Companies name and order these rounds differently, and a small team may fold two or three into one call. Expect most of them in some form.

• Recruiter or phone screen. Your recent work in two minutes, the tools you used in production, your notice period and pay. Tie each tool you name to something you ran with it.
• Linux, networking and scripting. Reading a process list, finding what fills a disk, why one service cannot reach another (DNS, ports, firewall rules), and a short Bash or Python script that parses a log or calls an API. This round finds people who know the tools only through a web console.
• Hands-on troubleshooting. A broken pipeline, a container that restarts in a loop, or an infrastructure plan that wants to delete a database. You say what you would check first and why. The order of your checks, said aloud, matters more than landing on the cause.
• Infrastructure design. How a web service is built, deployed and watched: environments, the pipeline, scaling, secrets, backups and rollback. Senior candidates also get asked about cost and about running in more than one region.
• Behavioral and on-call. An outage you handled, a release you pushed back on, a manual job you automated away. Interviewers listen for calm order and for what changed afterwards.

A worked DevOps Engineer answer: “Tell me about a production incident you handled.”

An example spoken answer: “Our checkout service started returning errors right after a routine release one evening. The alert came from our error-rate dashboard before any customer wrote in.

I was on call, so I opened an incident channel and posted one line: what was broken and who was looking. The release was the only change that hour, so I rolled it back first and watched the error rate return to normal. Then I looked for the cause on a staging copy. A new setting pointed at a database replica that existed in staging but not in production.

Afterwards I wrote a blameless postmortem. We added a pipeline step that compares the setting keys between environments, and we moved routine releases away from the end of the day.”

Why this DevOps Engineer answer works

• It says how the problem was noticed: an alert, before customers.
• It restores service first and hunts for the cause second.
• It names one concrete cause, not a vague “config issue”.
• It ends with a change to the system, not a promise to be more careful next time.

Build your own version with the STAR answer builder, and put in your real figures: how long the outage lasted and how many users it touched.

How a DevOps Engineer interview changes with your experience

• Fresher or first DevOps job. Expect Linux commands, Git, what CI/CD means, Docker basics and one cloud service. A home project that builds, tests and deploys itself on every push says more than a list of courses.
• Moving from development, testing or system administration. Lead with what you already automated in your old role. A developer can talk about the build, a sysadmin about servers, patching and backups. Then show how you learned the half you had not done.
• Experienced or senior. Fewer definitions, more design and judgment: how you split environments, migrate without downtime, set alert rules, and get other teams to adopt a pipeline. Go deeper with the Kubernetes interview questions and the Terraform interview questions.

DevOps Engineer interview questions people also ask

Is coding asked in a DevOps interview?

Usually some, but rarely the hard puzzle rounds a software developer gets. Expect a short script: read a log file, count errors, call an API or automate a manual step. Bash and Python are the common choices. Talk through the script as you write it, and say how you would test it before it runs against production.

What is the difference between a DevOps and an SRE interview?

The topics overlap. A DevOps interview leans toward pipelines, infrastructure as code and how teams ship. An SRE interview leans toward reliability targets, error budgets, on-call and incident work. If the job post mentions SLOs or error budgets, also practice the SRE interview questions.

Which tools should I know for a DevOps interview?

Read the job post first, because it names them. Most posts ask for Linux, Git, one CI system, containers, one cloud provider and an infrastructure as code tool. Depth in the tools you really used beats a long list. For each one, know why your team picked it, how you used it, and one thing it does badly.

How do I answer “What is DevOps?”

Start with people and process, not tools. For example: DevOps is a way of working where the people who build software and the people who run it share the job of getting changes to users safely and often. Then give one example from your own work, such as a pipeline that removed a manual release step.