- AZ-400 is Microsoft's exam code for the DevOps Engineer Expert certification, not a product name.
- Passing AZ-400 alone isn't enough - you also need an Azure Administrator or Azure Developer Associate credential.
- Domain 3 (build and release pipelines) is 50-55% of the exam, so "AZ-400" mostly means pipeline mastery.
- The exam costs $165 USD in the U.S., proctored through Pearson VUE, with a 700 passing score.
What AZ-400 Actually Means
"AZ-400" is Microsoft's internal exam code, not a marketing term. The "AZ" prefix identifies it as part of the Azure exam family, and "400" signals expert-level difficulty in Microsoft's numbering scheme - associate exams typically sit in the 100-300 range, while expert-level exams like AZ-400 and AZ-305 use higher numbers to reflect the deeper technical scope expected of candidates. In plain terms, AZ-400 is the identifier for the exam titled "Designing and Implementing Microsoft DevOps Solutions," and passing it is the qualifying step toward earning the Microsoft Certified: DevOps Engineer Expert title.
That distinction matters because people often use "AZ-400" loosely to describe the exam, the certification, and the job role interchangeably. They're related but not identical. If you're trying to understand the full picture, it's worth reading a dedicated breakdown of what AZ-400 is and how the exam code connects to the certification name.
The Credential Behind the Code
Microsoft Corporation governs the AZ-400 exam and the certification it leads to. Unlike many vendor certifications that stand alone, AZ-400 sits on top of an existing associate-level credential - meaning the "AZ-400" designation only becomes a full certification once you've also proven foundational Azure competency elsewhere. This layered structure is part of why the exam name carries more weight than a typical single-exam badge.
If you're comparing AZ-400 to other Microsoft role-based exams, the naming convention and structure are consistent across the board: exam code, passing score of 700, scaled scoring rather than raw percentage, and annual expiration with free renewal through an online assessment on Microsoft Learn. Understanding this pattern helps explain why what AZ-400 means extends beyond a simple acronym - it's shorthand for a specific, structured expert-level validation process.
What the Exam Name Really Tests: The Five Domains
The meaning of AZ-400 is best understood through what it actually measures. Microsoft organizes the exam into five domains, and the weighting tells you exactly what "DevOps Engineer Expert" is supposed to represent in practice.
Domain 1: Design and implement processes and communications (10-15%)
Covers collaboration strategy, work item tracking, and team communication patterns across GitHub and Azure DevOps.
- Establishing branching and merging strategies aligned with team workflows
- Designing feedback loops between development and operations
Domain 2: Design and implement a source control strategy (10-15%)
Focuses on repository structure, branching models, and migration strategies for source control.
- Choosing between trunk-based and feature-branch workflows
- Migrating repositories between platforms without losing history
Domain 3: Design and implement build and release pipelines (50-55%)
The dominant domain by far - over half the exam. This is where YAML pipelines, GitHub Actions, deployment strategies, and infrastructure as code live.
- Building multi-stage YAML pipelines in Azure Pipelines
- Configuring deployment strategies like blue-green, canary, and ring-based rollouts
- Managing package feeds, gates, approvals, and pipeline maintenance
Domain 4: Develop a security and compliance plan (10-15%)
Tests knowledge of securing pipelines, managing secrets, and embedding compliance checks into DevOps workflows.
- Integrating security scanning tools into CI/CD pipelines
- Managing secrets with Azure Key Vault and pipeline variable groups
Domain 5: Implement an instrumentation strategy (5-10%)
The smallest domain, covering monitoring, logging, and telemetry that feed back into release decisions.
- Configuring Application Insights for release health signals
- Designing alerting strategies tied to deployment gates
Because Domain 3 carries such disproportionate weight, most of what "AZ-400" means in practical terms is pipeline engineering - not general project management. For a full breakdown of how these five areas interact and where to focus your remaining prep time, see the complete guide to all five content areas, or drill into the pipeline-heavy section specifically through the Domain 3 study guide.
Key Takeaway
If you only have time to master one domain deeply, make it Domain 3. At 50-55% of the exam, weak pipeline knowledge alone can sink an otherwise strong attempt.
Why AZ-400 Isn't a Standalone Exam
One of the most misunderstood aspects of "AZ-400" is that passing the exam by itself does not grant the Microsoft Certified: DevOps Engineer Expert title. Microsoft requires candidates to also hold either the Microsoft Certified: Azure Administrator Associate or Microsoft Certified: Azure Developer Associate certification. This means AZ-400 assumes you already have hands-on experience administering or developing in Azure, plus practical exposure to implementing GitHub and Azure DevOps solutions.
This prerequisite structure explains why AZ-400 questions rarely test basic Azure concepts in isolation - they assume that foundation and instead test how you apply it across the software delivery lifecycle. If you're mapping out your certification path, the AZ-400 Certification overview covers the prerequisite chain in detail, and the difficulty implications are explored further in this complete difficulty guide.
| Element | Detail |
|---|---|
| Governing Body | Microsoft Corporation |
| Testing Provider | Pearson VUE (test center or online proctored) |
| Passing Score | 700 (scaled score, not raw percentage) |
| Prerequisite | Azure Administrator Associate OR Azure Developer Associate |
| Certification Validity | 1 year, renewable free via Microsoft Learn assessment |
| Dominant Domain | Build and release pipelines (50-55%) |
Registration, Pricing, and Delivery
The AZ-400 exam is delivered exclusively through Pearson VUE, either at a physical test center or via online proctoring from home or office. Pricing depends on the country or region where the exam is scheduled; in the United States, the commonly listed price is $165 USD, though final pricing is confirmed at scheduling and can change. There's no universally published question count or fixed duration - Microsoft displays the exact time allotment during the scheduling and launch process, so candidates should treat any specific number they see elsewhere as approximate rather than guaranteed.
Expect a mix of question formats consistent with other Microsoft role-based exams: multiple choice, multiple response, drag and drop, build list, hot area items, and potentially case studies or lab-based tasks. Scenario-based questions are common, meaning you'll often be asked to choose the best solution for a described organizational constraint rather than recall an isolated fact. A full cost and fee breakdown, including what to expect during registration, is available in the complete pricing breakdown.
Who Actually Cares About This Meaning
Understanding what AZ-400 means matters most when you're job hunting or negotiating scope with a hiring manager. Employers searching for DevOps engineers, release managers, platform engineers, and site reliability roles frequently list AZ-400 or the "DevOps Engineer Expert" title as a preferred or required qualification - particularly in organizations already standardized on Azure DevOps or GitHub Enterprise. Recruiters use the exam code as a shorthand filter, which is why clarity about what the credential actually certifies (pipeline design, release governance, security integration) helps you position your resume accurately rather than relying on the acronym alone.
If you're evaluating whether pursuing this credential fits your career trajectory, it helps to look at the kinds of roles currently referencing it. The AZ-400 Jobs overview breaks down common titles and responsibilities tied to the certification, while the ROI analysis weighs the time investment against the qualitative career benefits without relying on invented figures.
Turning Meaning Into a Study Plan
Once you understand that "AZ-400" essentially means "prove you can design, secure, and operate CI/CD pipelines end-to-end within an Azure/GitHub ecosystem," your study plan should mirror that weighting rather than treating all five domains equally. A simple way to structure preparation: spend the first stretch on foundational domains (1, 2, 4, 5 combined), then dedicate the largest, final block almost entirely to Domain 3 pipeline work - YAML syntax, deployment strategies, gates, and IaC - since it determines more than half your score.
Foundations: Domains 1, 2, and 4
- Source control branching strategies and process design
- Security and compliance integration basics
Domain 5 plus Domain 3 introduction
- Instrumentation and monitoring fundamentals
- Start YAML pipeline authoring in Azure Pipelines
Deep Domain 3 focus
- Deployment strategies, GitHub Actions, package management
- Full pipeline builds with gates and approvals
Practicing with scenario-based questions that mimic the actual exam format is one of the fastest ways to internalize domain weighting rather than just memorizing terminology. You can start working through realistic practice questions on our AZ-400 practice test platform to see how the domains show up in actual question phrasing, and return to the main practice test hub as you rotate through each domain during study.
Frequently Asked Questions
No. AZ-400 isn't an acronym - it's Microsoft's exam code, where "AZ" denotes the Azure exam family and "400" denotes expert-level difficulty. For more on the naming logic, see what AZ-400 stands for.
No. Passing AZ-400 is one requirement. You must also hold Microsoft Certified: Azure Administrator Associate or Azure Developer Associate to earn the full Microsoft Certified: DevOps Engineer Expert title.
In the United States, the exam is commonly listed at $165 USD, though pricing varies by country or region and is confirmed at scheduling.
Like other Microsoft role-based and expert certifications, it expires annually. Renewal is free and completed through an online assessment on Microsoft Learn before expiration.
Domain 3, Design and implement build and release pipelines, accounts for 50-55% of the exam - by far the largest share - so pipeline design, YAML, and deployment strategies deserve the most study time.