Getting a toy pipeline green on a public repo is straightforward. Knowing why pull_request_target just exposed your production NPM token to an untrusted fork, why PublishTestResults@2 silently skipped uploading failed xUnit runs, why standard Microsoft-hosted agents cannot reach your private-endpoint ACR, or why adding CODEOWNERS without branch ruleset enforcement still let an unreviewed checkout change merge is what Exam AZ-400 actually tests.

This course delivers 600 original, enterprise-grade DevOps questions across 6 full-length mock exams of 100 questions each, weighted strictly to Microsoft's official July 27, 2026 AZ-400 study guide:

• Design and implement processes and communications (10–15% -> 12 questions per exam)

• Design and implement a source control strategy (10–15% -> 13 questions per exam)

• Design and implement build and release pipelines (50–55% -> 52 questions per exam)

• Develop a security and compliance plan (10–15% -> 14 questions per exam)

• Implement an instrumentation strategy (5–10% -> 9 questions per exam)

IMPORTANT PREREQUISITE & LIFECYCLE NOTICE

1. Expert Certification Prerequisite: To earn the Microsoft Certified: DevOps Engineer Expert credential, you must pass Exam AZ-400 AND hold an active Microsoft Certified: Azure Administrator Associate (AZ-104) certification (or an active Azure Developer Associate AZ-204 earned prior to July 31, 2026).

2. Scheduled Retirement (February 1, 2027): Exam AZ-400 is live today. On October 15, 2026, Microsoft announced that Exam AZ-400 and DevOps Engineer Expert will retire on February 1, 2027, succeeded by Exam AZ-401 (Designing and Implementing Microsoft Agentic DevOps Solutions). All legacy TFS, TFVC, and retired Log Analytics MMA agent trivia has been excluded in favor of current Azure DevOps, GitHub Enterprise, Managed DevOps Pools, AMA/DCR, Bicep Deployment Stacks, Azure Deployment Environments, OIDC, and GHAS/GHAzDO architectures.

REALISTIC DEVOPS QUESTION PATTERNS (WITHIN UDEMY CSV LIMITS)

• YAML, CLI, Bicep, Git & KQL Completion (____): 17–29 items per exam testing Azure Pipelines YAML (extends, lockBehavior, Cache@2, DownloadSecureFile@1, SqlAzureDacpacDeployment@1), GitHub Actions (id-token: write, concurrency, workflow_call), Bicep what-if, Scalar/LFS/filter-repo, Dependabot, and Application Insights KQL

• Proposed Solution Evaluations: Diagnose subtle security, licensing, networking, and branching traps

• Ordered 4-Step Sequences (->): Rehearse exact setup sequences for OIDC Workload Identity Federation, Required Template environment checks, Git secret history purges, Artifacts @Release promotion, slot swaps, and ring gates

• Multi-Select Scenarios: 16 Select-two / Select-three items per exam with explicit selection counts

• 24 Original Enterprise Case Studies: Four 3-question case blocks per exam across FinTech, Healthcare, Aviation/IoT, B2B SaaS, Omnichannel Retail, and Gaming/Smart Grid

HONEST PLATFORM BOUNDARIES

Microsoft's live AZ-400 exam delivers 40–60 questions in 100–120 minutes with split-screen Microsoft Learn access and reports a 700 / 1000 scaled score. Each mock exam here contains 100 questions for comprehensive 34-skill depth, and raw practice percentages do not convert to a 700 scaled score. Interactive drag-and-drop widgets, hot-area dropdowns, split-pane case tabs, labs, and locked Yes/No series are adapted into text-complete CSV questions.