What Is AZ-400 Certification?

What Is AZ-400 Certification, Exactly?

AZ-400 is the exam code behind Microsoft Certified: DevOps Engineer Expert, a credential governed and administered by Microsoft Corporation. It measures whether a professional can design and implement strategies for collaboration, source control, build and release pipelines, security compliance, and instrumentation across the Azure and GitHub ecosystem. Unlike associate-level exams that test isolated skills, AZ-400 assumes you already function at a practitioner level and asks you to make architectural decisions about how a DevOps toolchain should be built end to end.

If you're still deciding whether this credential fits your career path, our companion pieces on What Is AZ-400? and AZ-400 Meaning unpack the naming convention and positioning in more depth. This article focuses specifically on what the certification tests, how it's delivered, and what you need going in.

Who AZ-400 Is Designed For

Microsoft built this exam for people who already administer or develop in Azure and who implement GitHub and Azure DevOps solutions as part of their job. That means the target candidate is typically a DevOps engineer, cloud infrastructure engineer, release manager, or senior developer who has moved past basic resource provisioning and into pipeline design, environment governance, and cross-team process improvement.

Hiring managers use this credential as a filter for roles that blend software delivery with operations accountability. If you're curious about the kinds of positions that reference AZ-400 in job postings, see AZ-400 Jobs for a breakdown of common titles and responsibilities. For a deeper look at whether the investment pays off relative to your current role, Is the AZ-400 Certification Worth It? Complete ROI Analysis 2026 walks through the tradeoffs.

The Five Domains That Define the Exam

Microsoft organizes AZ-400 into five skill domains, each carrying a different weight toward your final score. Understanding these weights is the single most important planning decision you'll make, because time spent evenly across all five domains is time misallocated.

Because Domain 3 alone can represent over half the exam, it's worth studying each domain individually rather than treating the exam as one undifferentiated block. We've published dedicated study guides for the domains where candidates most often lose points: Domain 1: Design and implement processes and communications, Domain 2: Design and implement a source control strategy, Domain 3: Design and implement build and release pipelines, and Domain 4: Develop a security and compliance plan. For a full walkthrough of how all five domains interconnect, see AZ-400 Exam Domains 2026: Complete Guide to All 5 Content Areas.

Registration, Pricing, and Delivery Mechanics

AZ-400 is proctored exclusively through Pearson VUE, and candidates can choose between an in-person test center or online proctoring from a private location that meets Microsoft's testing environment requirements. Pricing depends on the country or region where the exam is scheduled; in the United States, the commonly listed price is $165 USD. Final pricing is always confirmed at the point of scheduling, since it can change, so treat any number you read online as a planning estimate rather than a guarantee.

Microsoft does not publish a fixed public duration or exact question count that applies to every delivery of the exam. Instead, your specific exam time is displayed during scheduling and again at the start of the test session. Budget your test-day time based on what's shown at launch rather than relying on secondhand estimates. For a full cost breakdown, including what happens if you need a retake, see AZ-400 Certification Cost 2026: Complete Pricing Breakdown.

Question Formats and Passing Score

AZ-400 uses a mix of question types designed to test applied judgment, not just recall. Expect scenario-based items layered with multiple choice, multiple response, drag and drop, build list, hot area, and case study formats, plus lab-based tasks in some deliveries. Case studies in particular require you to read a business scenario and answer several questions against the same context, so time management across a case study matters as much as domain knowledge.

The passing score is 700, reported on Microsoft's scaled scoring system rather than as a raw percentage of questions answered correctly. That scaled score accounts for the varying difficulty of individual items, so two candidates who each get roughly the same number of questions "right" may still see different scaled results depending on which questions they answered correctly. If you want a realistic sense of how tough this format actually feels in practice, read How Hard Is the AZ-400 Exam? Complete Difficulty Guide 2026, and if you're curious how candidates typically perform, AZ-400 Pass Rate 2026: What the Data Shows breaks down what's publicly known.

Prerequisites and the Expert-Level Path

Passing AZ-400 alone does not grant you the Microsoft Certified: DevOps Engineer Expert title. Microsoft requires that you also hold either the Microsoft Certified: Azure Administrator Associate or the Microsoft Certified: Azure Developer Associate certification. This structure exists because AZ-400 assumes a baseline of Azure fluency that it doesn't retest directly; it builds on top of the administrator or developer skill set rather than duplicating it.

Practically, this means your prep sequence matters. If you don't already hold one of the prerequisite associate certifications, plan to earn that first, since it establishes the Azure resource, networking, and deployment fundamentals that AZ-400 scenarios take for granted. Candidates who skip straight to AZ-400 without that foundation often struggle with questions that assume familiarity with Azure resource groups, RBAC, and networking constructs.

Planning Your Prep Around the Dominant Domain

Because Domain 3 (build and release pipelines) carries roughly half the exam's weight, your study schedule should be lopsided on purpose. A common mistake is dividing prep time evenly across five domains as if they were weighted equally - that approach under-invests in the one domain that decides most of your score.

Spacing your review sessions and revisiting pipeline concepts repeatedly, rather than cramming them once, tends to produce better retention given how heavily the exam leans on Domain 3. For a complete week-by-week structure with more detail than a summary schedule can offer, see AZ-400 Study Guide 2026: How to Pass on Your First Attempt. Running scenario-style practice questions on our AZ-400 practice test platform before test day is one of the most direct ways to get comfortable with the case-study format Microsoft uses.

After You Pass: Renewal and Career Impact

Microsoft Certified: DevOps Engineer Expert, like other Microsoft role-based and expert certifications, expires annually. Renewal doesn't require retaking the full AZ-400 exam - instead, you pass a free online renewal assessment through Microsoft Learn before your expiration date. This keeps the credential current with evolving Azure DevOps and GitHub capabilities without forcing a full re-exam cycle every year.

From a career standpoint, the certification signals to employers that you can own the full DevOps lifecycle: process design, source control governance, pipeline architecture, security integration, and monitoring. If you're weighing how this translates into compensation, AZ-400 Salary Guide 2026: Complete Earnings Analysis looks at how the credential factors into DevOps engineering roles. And if you want a broader primer that ties the certification name, meaning, and structure together in one place, AZ-400 Certification and What Does AZ-400 Stand For? are good companion reads.

Whichever path you're coming from, structured practice with realistic question formats on our practice exam platform remains one of the most efficient ways to close knowledge gaps before you schedule with Pearson VUE.

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