Five years of professional development. C#, .NET, some Python. Deployed plenty of apps to Azure. Used App Service, Functions, Cosmos DB — the works.
Scored 735 on my first AZ-204 attempt. Passing is 700. I survived by 35 points. That's not a comfortable margin.
The problem wasn't that I couldn't develop. The problem was that I couldn't develop the way Microsoft wanted me to answer questions about developing.
The AZ-204 Is Not a Coding Exam
This is the biggest misconception. You'd think "Azure Developer Associate" means they test your coding ability. Nope.
The AZ-204 tests your knowledge of Azure services, their configurations, and when to use which one. It's a services exam wearing a developer costume.
Here's what actually showed up:
Azure App Service (heavy focus):
- Deployment slots and slot swapping
- WebJobs vs Azure Functions — when to use which
- Custom domains, SSL binding, scaling rules
- I got multiple questions about App Service deployment strategies
Azure Functions (heavier than expected):
- Durable Functions — orchestrator functions, activity functions, entity functions. This topic alone probably covered 5-6 questions
- Trigger bindings — HTTP, timer, queue, blob. Know the binding syntax
- Cold start optimization
Cosmos DB (the exam loves this):
- Partitioning strategies. If you don't understand logical vs physical partitions, you'll lose 3-4 easy questions
- Consistency levels — strong, bounded staleness, session, consistent prefix, eventual. Know the tradeoffs
- Change feed
Azure Storage:
- Blob storage tiers (hot, cool, archive)
- SAS tokens — service SAS vs account SAS vs user delegation SAS
- Lease operations on blobs
Security (this is where I almost died):
- Azure Key Vault — certificate management, secret rotation
- Managed identities — system-assigned vs user-assigned
- Microsoft Identity Platform / MSAL
The Topics That Caught Me Off Guard
Durable Functions
I'd used Azure Functions plenty. But Durable Functions? In production? Once, maybe. The exam asks about fan-out/fan-in patterns, function chaining, human interaction patterns, and eternal orchestrations. This isn't surface-level knowledge.
API Management (APIM)
I barely studied this. Got 3-4 questions on it. Policies, products, subscriptions, rate limiting. If you skip APIM, you're gambling.
Azure Cache for Redis
Another topic I underestimated. Cache-aside pattern, connection multiplexing, data expiration strategies. Quick hits but easy points to lose.
What I'd Do Differently
If I could rewind and study again, here's my plan:
Week 1-2: Microsoft Learn's AZ-204 learning path. It's free and covers everything. Don't skip the lab exercises.
Week 3: Deep dive into the three heavy hitters — App Service, Azure Functions (especially Durable), and Cosmos DB. These three topics are probably 40% of the exam.
Week 4: Security services — Key Vault, Managed Identities, MSAL. Plus Azure Storage and Redis Cache.
Week 5: API Management, Event Grid, Service Bus, Azure CDN. These are the "medium weight" topics that show up just enough to matter.
Week 6: Practice exams, practice exams, practice exams.
For practice, ExamCert's AZ-204 questions saved my second attempt. The questions are scenario-based — "Your company needs to implement a solution that..." — which is exactly how Microsoft frames things. $4.99 for lifetime access is laughable compared to the $165 exam fee. Use the money-back guarantee if it doesn't work out.
Code Snippets in Questions
Here's something nobody warns you about: the AZ-204 includes code snippets in questions. You'll see C# or Python code and need to identify what's wrong or fill in the blank.
You don't need to be an expert coder. But you need to:
- Read C# syntax (HttpClient, async/await, attribute decorations)
- Understand Azure SDK patterns (DefaultAzureCredential, BlobServiceClient)
- Recognize common configuration patterns in appsettings.json
If you're a Python developer who's never seen C#, spend a few hours getting comfortable with the syntax. Most code questions aren't language-specific, but the examples lean heavily C#/.NET.
The Elephant in the Room: AZ-204's Future
Microsoft is restructuring certs in 2026. There are rumors the AZ-204 might evolve to include more AI integration topics (Azure OpenAI Service, Semantic Kernel). Nothing confirmed yet, but the current AZ-204 is still very much alive and valuable.
If anything, the developer cert is becoming MORE important as Microsoft pushes "AI-enhanced development" across Azure. Every Azure developer will need to understand how to integrate AI services into their apps.
The Honest Truth About This Cert
The AZ-204 is harder than most people expect. It's not a beginner cert — you need real development experience to contextualize the questions. But it's absolutely achievable in 6-8 weeks of focused study.
My biggest mistake: assuming my development experience would carry me through without structured study. Don't make that mistake. Even experienced devs need to study the specific Azure service configurations that Microsoft tests.
Get the practice questions. Build a study plan. And for the love of all things serverless, don't skip Durable Functions.
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