Quick Answer
The answer is Azure App Service on Windows, because it natively supports Windows authentication through its built-in integration with Azure Active Directory and on-premises Active Directory via Azure AD Domain Services or hybrid identity setups, while also offering persistent storage options like Azure Files with minimal code changes. This choice directly aligns with the search intent to migrate .NET Framework with Windows authentication to Azure compute without reworking the authentication layer or storage logic. On the AZ-204 exam, this scenario tests your understanding of PaaS versus IaaS trade-offs, often appearing as a trap where candidates mistakenly choose Azure Virtual Machines for full control, forgetting that App Service on Windows handles Windows auth and persistent storage out-of-the-box. The key memory tip is “PaaS for Windows auth: App Service wins the race”—if the app uses Windows authentication and you want to minimize rework, always pick App Service on Windows over VMs or containers.
This AZ-204 practice question tests your understanding of develop azure compute solutions. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are migrating an on-premises .NET Framework app to Azure. The app uses Windows authentication and requires persistent storage. You want to minimize rework. Which Azure compute service should you choose?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Azure Spring Apps
Why wrong: Spring Apps is for Java workloads.
Azure Functions
Why wrong: Functions are stateless and event-driven, not ideal for persistent storage.
Azure Container Instances
Why wrong: ACI runs containers; .NET Framework may not be containerized easily.
Azure App Service on Windows
App Service supports Windows authentication and persistent storage with Azure Files.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure App Service on Windows
Azure App Service on Windows (D) supports Windows authentication natively via its built-in integration with Azure Active Directory and on-premises Active Directory through Azure AD Domain Services or hybrid identity setups. It also provides persistent storage options like Azure Files or blob storage attached to the web app, minimizing rework by allowing the existing .NET Framework app to run with minimal code changes in a Platform-as-a-Service (PaaS) environment.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Azure Spring Apps
Why it's wrong here
Spring Apps is for Java workloads.
Azure Functions
Why it's wrong here
Functions are stateless and event-driven, not ideal for persistent storage.
Azure Container Instances
Why it's wrong here
ACI runs containers; .NET Framework may not be containerized easily.
Azure App Service on Windows
Why this is correct
App Service supports Windows authentication and persistent storage with Azure Files.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often choose Azure Functions or Container Instances for their 'modern' appeal, overlooking the specific requirement for Windows authentication and minimal rework, which Azure App Service on Windows uniquely satisfies without forcing a rewrite or containerization.
Detailed technical explanation
Under the hood, Azure App Service on Windows uses IIS (Internet Information Services) as the web server, which supports Windows Integrated Authentication via Kerberos or NTLM when the app is configured with a virtual network integration to an on-premises domain or Azure AD Domain Services. Persistent storage can be achieved using Azure Files mounted as a share, or by leveraging the app's local storage with replication across instances, ensuring stateful data survives restarts. In a real-world migration, this allows a legacy ASP.NET Web Forms app using Windows authentication to be lifted-and-shifted with minimal changes, while still benefiting from Azure's auto-scaling and managed patching.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Develop Azure compute solutions — This question tests Develop Azure compute solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure App Service on Windows — Azure App Service on Windows (D) supports Windows authentication natively via its built-in integration with Azure Active Directory and on-premises Active Directory through Azure AD Domain Services or hybrid identity setups. It also provides persistent storage options like Azure Files or blob storage attached to the web app, minimizing rework by allowing the existing .NET Framework app to run with minimal code changes in a Platform-as-a-Service (PaaS) environment.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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