AZ-400 Study Guide 2026

AZ-400 Highlights You Should Know

AZ-400 is the Microsoft exam for the Microsoft Certified: DevOps Engineer Expert certification. In 2026, it covers seven domains: Develop an instrumentation strategy (5-10%), Develop a Site Reliability Engineering (SRE) strategy (5-10%), Develop a security and compliance plan (10-15%), Manage source control (10-15%), Facilitate communication and collaboration (10-15%), Define and implement continuous integration (20-25%), and Define and implement a continuous delivery and release management strategy (10-15%). A passing score of 700 on a scale of 100-1000 is required. Pricing is typically $165 USD but varies by location. Crucially, candidates must first earn either the Azure Administrator Associate (AZ-104) or the Azure Developer Associate (AZ-204) certification as a prerequisite. A typical preparation window is 8–16 weeks after meeting the prerequisite. The recommended study path combines the official Microsoft Learn materials with extensive, mandatory hands-on experience building YAML pipelines in Azure DevOps. The certification must be renewed annually via a free online assessment. This guide details official resources, including the study guide, scheduling pages, and exam policies.

Introduction: What is the AZ-400 and Why Does It Matter?

The Microsoft Certified: DevOps Engineer Expert certification, earned by passing the AZ-400 exam, is one of the most respected and challenging credentials in the cloud industry. This certification is about far more than just technology; it’s a validation of your expertise in the people, processes, and tools required to deliver continuous value to end users. DevOps is a culture and a practice that aims to break down the traditional silos between software development and IT operations, and this exam proves you are a leader who can make that happen.

This certification solves the ultimate business problem: how to deliver better software, faster and more reliably. A DevOps Engineer is the architect of the software delivery pipeline. They are responsible for source control, continuous integration (CI), continuous delivery (CD), infrastructure as code (IaC), security, and monitoring. Earning the AZ-400 demonstrates you have mastered the full lifecycle of a modern application, making you an invaluable asset to any organization looking to accelerate its innovation.

Quick Facts & Exam Details

Is This Certification Right for You? (Target Audience)

This expert-level certification is designed for experienced professionals who are ready to bridge the gap between development and operations. You are the ideal candidate if you are:

• An Azure Administrator (AZ-104 certified) with a passion for automation and infrastructure as code who wants to manage the entire application lifecycle.
• An Azure Developer (AZ-204 certified) who wants to take ownership of the build and release pipelines and manage the infrastructure their code runs on.
• An IT professional with a background in release management, quality assurance, or systems administration who is now responsible for implementing DevOps practices.

Candidates for this exam are expected to have subject matter expertise in working with people, processes, and technologies to continuously deliver business value.

Exam Blueprint: Skills You’ll Be Tested On

The AZ-400 exam tests your ability to design and implement a complete DevOps strategy. Always check the official Microsoft exam page for the latest skill breakdown.

• Develop an instrumentation and SRE strategy (10-15%)
  This domain combines monitoring and reliability. You must be able to design a feedback mechanism using tools like Azure Monitor and Application Insights and develop a strategy for measuring and improving reliability through Service Level Objectives (SLOs) and Service Level Indicators (SLIs).
• Develop a security and compliance plan (10-15%)
  This is all about DevSecOps—integrating security into your pipeline. You will be tested on your ability to manage secrets using Azure Key Vault, automate security scanning for source code and open-source dependencies, and design governance enforcement with Azure Policy. You can dive deeper into security topics to strengthen your understanding of this domain.
• Manage source control (10-15%)
  Here, you’ll prove your deep understanding of modern source control with Git. This includes designing and implementing branching strategies like GitFlow, configuring pull request policies for code quality, and managing repositories in Azure Repos.
• Facilitate communication and collaboration (10-15%)
  This domain covers the “people and process” side of DevOps. It tests your ability to integrate Azure Boards with your pipelines to provide traceability, create dashboards to share progress, and configure wikis for documentation.
• Define and implement continuous integration (CI) (20-25%)
  As a heavily weighted domain, CI is critical. You must have hands-on skills in designing and building CI pipelines using Azure Pipelines (primarily with YAML) that compile code, run automated tests, and publish artifacts.
• Define and implement a continuous delivery (CD) and release management strategy (10-15%)
  This is the “delivery” half of the pipeline. It requires you to design the release strategy, including the use of release and deployment approvals, and implement deployment patterns like blue-green and canary releases.

Your Strategic Study Plan for Success

Passing the AZ-400 requires a deep, hands-on understanding of both the tools and the culture of DevOps.

Phase 1: Validate Your Prerequisite Foundation (Critical)

• Confirm Your Associate Expertise: You must hold either the AZ-104 or AZ-204 certification. The AZ-400 assumes you already have deep knowledge of either Azure administration or development. Be honest about your weak points. If you are an admin, spend time learning basic coding and build processes. If you are a developer, learn about networking, IaaS, and monitoring.
• Start with Microsoft Learn: Begin your journey with the official AZ-400 learning path on Microsoft Learn. This is your foundational resource.

Phase 2: Deep Dive with Mandatory Hands-On Pipelines (The Core of Your Prep)

Live in Azure DevOps: The only way to learn is by doing. Sign up for a free Azure DevOps organization. Your goal is to build a complete CI/CD pipeline from scratch.

Build an End-to-End Project:

• Push a sample application (e.g., a simple web app) to a new Git repository in Azure Repos.
• Create a YAML pipeline in Azure Pipelines that triggers on a push to your main branch. This pipeline should build your code, run unit tests, and publish the build artifacts.
• Create a second stage in your pipeline that deploys the application to an Azure App Service.
• Integrate a security tool like the Microsoft Security DevOps extension to scan for vulnerabilities.
• Link your pipeline to work items in Azure Boards.

Phase 3: Final Prep with Case Studies (Weeks 9-12)

• Use High-Quality Practice Exams: The AZ-400 is famous for its long, complex case studies that require you to design a holistic DevOps strategy. Practice exams are the best way to train your ability to analyze these scenarios. While official materials are a great start, you can find a variety of Microsoft practice questions to ensure you are prepared for different formats. When you get a question wrong, understand the DevOps principle you violated.
• Analyze Your Strategy: When you get a question wrong, understand the DevOps principle you violated. Did you choose a branching strategy that didn’t fit the team’s release cadence? Did you forget to include security scanning?
• Review the Exam Guide: In the final week, reread the official skills outline to ensure you are confident in every topic.

Career and Salary Opportunities

The DevOps Engineer is one of the most in-demand and highest-paying roles in the technology industry.

• Market Demand: Every company is a software company, and every software company needs to deliver features faster and more reliably. This has created a massive, sustained demand for skilled DevOps professionals.
• Salary Expectations: An expert-level certification in this field is a direct path to a top-tier salary.
• According to ZipRecruiter, the average annual salary for an Azure DevOps Engineer in the United States is approximately 134,844, with many roles ranging from 120,000 to $150,500.
• Glassdoor data shows the estimated total pay for a DevOps Engineer is around 138,561 per year, with a likely range between 115,000 and $170,000.

Exam Logistics: Policies You Need to Know

• Retake Policy: If you do not pass on your first attempt, you must wait 24 hours before retaking it. For all subsequent attempts, a 14-day waiting period is imposed. You may not take the same exam more than five times in a 12-month period.
• Certification Validity: The Microsoft Certified: DevOps Engineer Expert certification is valid for one year.
• Renewal Process: You must renew your certification annually by passing a free, online, unproctored renewal assessment on Microsoft Learn. This assessment is shorter and focuses on recent updates to the technology.
• Scheduling: You can schedule your exam to be taken at a testing center or online via the official Microsoft certification website.

Practical FAQs & Common Challenges

How much hands-on experience is truly necessary for this expert exam?

A significant amount is required. This is not a theoretical exam. You should have practical, hands-on experience building and troubleshooting CI/CD pipelines, managing Git repositories, and working with infrastructure as code. You need to have “lived” in Azure DevOps or a similar platform.

What are the official prerequisites for this certiftication?

This is a critical point that is often missed. To earn the DevOps Engineer Expert certification, you must first hold either the Microsoft Certified: Azure Administrator Associate (AZ-104) or the Microsoft Certified: Azure Developer Associate (AZ-204) certification.

I have the AZ-104 (Admin) but no dev experience. Can I still pass the AZ-400?

It will be very challenging. The AZ-400 requires you to understand the developer side of the house: code compilation, dependencies, unit testing, and branching strategies. You will need to dedicate significant study time to learning these fundamental development concepts to be successful.

I have the AZ-204 (Developer) but no ops experience. Is that a better path?

It can be a more natural path, but it’s also challenging. You will need to learn the operations side: infrastructure as code (ARM/Bicep), networking, monitoring, and security from an operational perspective. You essentially need to learn the core concepts from the AZ-104.

Should I focus on YAML pipelines or the Classic editor?

Focus 100% of your hands-on practice on YAML pipelines. While you should be able to recognize the Classic UI editor, the industry standard and the heavy focus of the exam is on defining your pipelines as code using YAML.

Which exam domains or topics do most candidates find the most challenging?

The more conceptual domains, like designing an SRE strategy and a security/compliance plan, can be difficult as they test your understanding of principles, not just tools. For the technical domains, mastering the syntax and structure of complex, multi-stage YAML pipelines is the biggest hurdle for most candidates.

What is the best strategy for the case study questions?

First, read the questions associated with the case study to understand the problems you need to solve. Then, skim the business requirements and technical challenges in the case study. Pay close attention to the stated goals (e.g., “improve release velocity,” “increase security,” “reduce downtime”). Use these goals to guide your technical design choices.

Conclusion: Your Next Step

Achieving the Microsoft Certified: DevOps Engineer Expert certification is a career-defining accomplishment. It signifies that you are a leader in modern software delivery, capable of uniting development and operations to drive business value. The journey is demanding and requires you to become a true “jack-of-all-trades,” but the professional respect and opportunities it commands are unparalleled.

Your path to becoming a certified expert starts now. Take the first step by visiting the official Azure DevOps Labs to get hands-on experience and begin your journey. you can visit PassITExams. Your path to becoming a certified expert starts now.