- A
Azure Functions
Why wrong: Azure Functions is a serverless compute service optimized for event-driven, short-running tasks. While it can host web APIs, it is not designed for hosting a full web application with a UI framework like ASP.NET Core and lacks persistent web server features for a dashboard scenario.
- B
Azure App Service
Azure App Service is a fully managed PaaS service that runs web applications, REST APIs, and mobile backends. It supports ASP.NET Core out of the box, handles patching of the OS and web server, and provides built-in scaling and load balancing, meeting the requirement of not managing infrastructure.
- C
Azure Kubernetes Service (AKS)
Why wrong: AKS is a managed Kubernetes container orchestration service. While it abstracts the control plane, the team would still need to manage container images, pod configurations, and cluster node scaling. It does not provide a fully managed web server experience and adds operational complexity unsuitable for the stated goal.
- D
Azure Virtual Machines
Why wrong: Azure Virtual Machines offer IaaS, giving full control over the operating system and web server. However, the team explicitly wants to avoid managing the underlying infrastructure, so this option contradicts the requirement and would involve patching, updates, and configuration overhead.
Quick Answer
The answer is Azure App Service. This is the correct choice because it offers fully managed web app hosting for ASP.NET Core, meaning Microsoft handles the web server, operating system, and patching, so the development team can focus solely on their real-time production dashboard code. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of Platform as a Service (PaaS) versus Infrastructure as a Service (IaaS); a common trap is confusing App Service with Azure Virtual Machines, which require you to manage the OS and server yourself. For a memory tip, remember that App Service is for “apps only”—you bring the code, Azure handles the rest, making it the ideal fully managed web app hosting solution for ASP.NET Core workloads that demand high availability without operational overhead.
AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. 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.
A manufacturing company is building a web-based dashboard to display real-time production metrics from sensors. The development team wants to deploy the application without managing the underlying infrastructure, including the web server and operating system. The application uses ASP.NET Core. Which Azure service should they use?
Answer choices
Why each option matters
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
Azure App Service is the correct choice because it provides a fully managed platform for hosting web applications, including ASP.NET Core, without requiring the user to manage the underlying web server or operating system. It supports continuous deployment, auto-scaling, and built-in load balancing, making it ideal for a real-time dashboard that needs high availability and minimal operational overhead.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Azure Functions
Why it's wrong here
Azure Functions is a serverless compute service optimized for event-driven, short-running tasks. While it can host web APIs, it is not designed for hosting a full web application with a UI framework like ASP.NET Core and lacks persistent web server features for a dashboard scenario.
- ✓
Azure App Service
Why this is correct
Azure App Service is a fully managed PaaS service that runs web applications, REST APIs, and mobile backends. It supports ASP.NET Core out of the box, handles patching of the OS and web server, and provides built-in scaling and load balancing, meeting the requirement of not managing infrastructure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Azure Kubernetes Service (AKS)
Why it's wrong here
AKS is a managed Kubernetes container orchestration service. While it abstracts the control plane, the team would still need to manage container images, pod configurations, and cluster node scaling. It does not provide a fully managed web server experience and adds operational complexity unsuitable for the stated goal.
- ✗
Azure Virtual Machines
Why it's wrong here
Azure Virtual Machines offer IaaS, giving full control over the operating system and web server. However, the team explicitly wants to avoid managing the underlying infrastructure, so this option contradicts the requirement and would involve patching, updates, and configuration overhead.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Functions with a general-purpose web host, but Functions is optimized for stateless, event-driven triggers and lacks the persistent HTTP session and WebSocket support needed for a real-time dashboard.
Trap categories for this question
Scenario analysis trap
Azure Functions is a serverless compute service optimized for event-driven, short-running tasks. While it can host web APIs, it is not designed for hosting a full web application with a UI framework like ASP.NET Core and lacks persistent web server features for a dashboard scenario.
Detailed technical explanation
How to think about this question
Azure App Service runs applications in a sandboxed environment called a 'worker process' (w3wp.exe for ASP.NET), abstracting the IIS web server and OS. It supports WebSocket connections (via HTTP/1.1 upgrade), which is critical for real-time dashboards using SignalR or similar technologies. Under the hood, App Service uses a multi-tenant architecture with automatic patching and health monitoring, ensuring the application stays responsive without manual intervention.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
TExam Day Tips
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-900 question test?
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure App Service — Azure App Service is the correct choice because it provides a fully managed platform for hosting web applications, including ASP.NET Core, without requiring the user to manage the underlying web server or operating system. It supports continuous deployment, auto-scaling, and built-in load balancing, making it ideal for a real-time dashboard that needs high availability and minimal operational overhead.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.
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