Microsoft · Expert

Microsoft DevOps Engineer Expert (AZ-400) practice exam & study guide

The Microsoft DevOps Engineer Expert (AZ-400) is Microsoft’s expert certification for DevOps. It validates the ability to design and implement DevOps practices for processes and communication, source control, build and release pipelines, security and compliance, and instrumentation, using Azure DevOps and GitHub.

AZ-400 is a hands-on, expert exam heavily weighted toward CI/CD. Questions test how you design and implement pipelines, source control, and DevOps practices across Azure DevOps and GitHub, not just what the tools are.

This free hub gives you everything you need to prepare: a syllabus breakdown by exam domain, realistic scenario-style practice questions with teacher-style explanations, a glossary of the Azure DevOps and GitHub concepts the exam relies on, and full-length timed mock exams that mirror the real testing experience.

60
Questions
120 min
Time limit
70%
Mock pass %
5
Domains

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  2. 2
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  3. 3
    Sit a timed mock

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All AZ-400 study resources

AZ-400 exam domains

The AZ-400 exam is weighted across 5 domains. Pick any domain below to drill it — or read the full breakdown in the FAQ.

Exam domainExam weightPractice
Design and implement processes and communications12%Practice this topic
Design and implement a source control strategy13%Practice this topic
Design and implement build and release pipelines53%Practice this topic
Develop a security and compliance plan13%Practice this topic
Implement an instrumentation strategy9%Practice this topic

Sample AZ-400 questions

A sample of the AZ-400 questions on this hub. Each links through to the full question, the correct answer, and an explanation of why every other option is wrong.

Key AZ-400 terms

Start with these terms, then explore the full glossary. Each links to a plain-English definition written for the AZ-400 exam.

AZ-400 frequently asked questions

What is the AZ-400 certification?+

Microsoft positions the DevOps Engineer as a developer or infrastructure administrator who enables continuous delivery of value — combining people, processes, and products for continuous integration, testing, delivery, deployment, monitoring, and feedback.

It expects experience both administering and developing in Azure, plus experience with GitHub and Azure DevOps, and covers the full DevOps lifecycle with a strong emphasis on build and release pipelines.

What topics are on the AZ-400 exam?+

The AZ-400 exam is organised into five weighted domains. The percentages below are the midpoints of Microsoft’s published ranges, normalized to total 100. Build and release pipelines dominate the exam at over half its weight.

Design and implement processes and communications (12%)

Covers designing traceability and flow of work (GitHub Flow, Azure Boards and GitHub Projects), designing metrics and dashboards (cycle time, lead time, MTTR), and configuring collaboration through wikis, webhooks, and Boards-GitHub-Teams integration.

Design and implement a source control strategy (13%)

Covers branching strategies (trunk-based, feature branch, release branch), pull-request workflows with branch policies and protection rules, and managing repositories including Git LFS, permissions, tags, and data recovery.

Design and implement build and release pipelines (53%)

By far the heaviest domain — over half the exam. It covers package management, testing strategy and gates, implementing pipelines with GitHub Actions and Azure Pipelines (YAML, runners/agents, multi-stage, templates), deployment strategies (blue-green, canary, feature flags), infrastructure as code (ARM/Bicep), and maintaining pipelines.

Develop a security and compliance plan (13%)

Covers authentication and authorization (service principals vs managed identities, GitHub and Azure DevOps auth), managing secrets with Azure Key Vault and secretless authentication, and automating security and compliance scanning with GitHub Advanced Security, Defender for Cloud DevOps Security, and Dependabot.

Implement an instrumentation strategy (9%)

The smallest domain. It covers configuring monitoring with Azure Monitor and Application Insights, GitHub insights, and alerts, and analyzing metrics and telemetry including distributed tracing and basic KQL.

Is the AZ-400 hard?+

AZ-400 is an expert exam that assumes you already know Azure administration and development — it builds on that with DevOps practice across both Azure DevOps and GitHub. Its heavy pipeline weighting means deep CI/CD knowledge is essential.

The difficulty comes from the breadth of tooling across two platforms and from scenario questions that hinge on the right pipeline, branching, or deployment design. Practising real pipeline scenarios is the key.

How many questions are on the AZ-400 exam and how long is it?+

Microsoft does not fix a single public question count for AZ-400; it typically presents roughly 40–60 questions in a mix of formats — multiple choice, multiple response, and case studies — with about 120 minutes of working time.

Our full-length practice mock uses a 60-question, 120-minute session so you can rehearse pacing under realistic time pressure before test day.

What score do you need to pass the AZ-400?+

Microsoft scores AZ-400 on a scale of 1 to 1,000, and the passing score is 700. That is a scaled score rather than a raw 70%, because Microsoft adjusts for question difficulty, and there is no penalty for wrong answers, so you should never leave a question blank. Our practice mock uses a 70% threshold to give you a comparable target.

How much does the AZ-400 exam cost?+

The AZ-400 exam fee is set by Microsoft and varies by region — check the Microsoft certification page for current pricing. Microsoft expert certifications are valid for one year and can be renewed for free through an online assessment on Microsoft Learn. Everything on this hub is free.

Who should take the AZ-400?+

AZ-400 is aimed at DevOps engineers, and at developers or infrastructure administrators moving into DevOps, who enable continuous delivery across development and operations teams.

Microsoft recommends experience both administering and developing in Azure, with strong skills in at least one area, plus experience with GitHub and Azure DevOps. Earning the certification also requires holding either the Azure Administrator (AZ-104) or Azure Developer (AZ-204) associate certification.

What jobs and salaries can the AZ-400 lead to?+

AZ-400 maps to roles such as DevOps engineer, platform engineer, and site reliability engineer, where automating delivery across Azure DevOps and GitHub is central. As an expert credential it is a senior DevOps certification.

How much any certification moves compensation depends heavily on geography, seniority, and hands-on experience, so treat any single salary figure with caution. AZ-400 is best viewed as validation of DevOps engineering skill rather than a guaranteed raise on its own.

How long does it take to study for the AZ-400?+

Candidates with DevOps experience often need six to ten weeks; those newer to Azure DevOps or GitHub should plan longer. The most efficient path is to study each domain — especially pipelines — while building real CI/CD in Azure DevOps and GitHub, then drill scenario questions.

Review every explanation, including for questions you answered correctly, because AZ-400 distractors are built from plausible but incorrect DevOps designs. Use the per-domain results here to find and shore up your weakest area, then finish with full-length timed mocks.

How should you prepare for the AZ-400?+

Study the five domains above, giving by far the most time to build and release pipelines, then drill scenario questions domain by domain. Every MockAPI question reveals a full explanation and tells you why each wrong answer is wrong — essential for an exam that turns on exact pipeline and DevOps designs.

When you can answer scenarios comfortably, move to full-length timed mocks, ideally alongside hands-on practice with Azure Pipelines and GitHub Actions. Use the glossary to keep the tools straight, and aim to score consistently above the pass mark before you book.

Can you take the AZ-400 exam online?+

Yes. Microsoft delivers AZ-400 through Pearson VUE, so you can test at a physical Pearson VUE centre or online with remote proctoring (OnVUE). The online exam requires a private, quiet room, a clear workspace, a webcam and microphone, a stable connection, and government-issued photo ID, with a proctor monitoring you and a room scan before you start.

If you do not pass, Microsoft requires a 24-hour wait before a second attempt; after that, a 14-day wait applies between further attempts, with a limit of five attempts in a 12-month period, and each attempt needs its own registration. Once you pass, the certification is renewable for free on Microsoft Learn.

What certification should you take after the AZ-400?+

After AZ-400, common next steps include the Azure Solutions Architect Expert (AZ-305) for broader design, or specialty and security certifications such as AZ-500, depending on your focus.

For many, the real next step is leading DevOps practice on larger teams. Pairing AZ-400 with hands-on delivery experience is what turns the certificate into a career.