The answer is Azure Blob Storage static website hosting. This is the most cost-effective option because it serves HTML, CSS, and JavaScript files directly from a storage container over HTTP, eliminating the need to pay for any compute resources like virtual machines or App Service plans. On the Microsoft Azure Fundamentals AZ-900 exam, this question tests your understanding of when to choose platform-as-a-service (PaaS) compute versus infrastructure-as-a-service (IaaS) storage for hosting needs. A common trap is selecting App Service, which incurs ongoing costs even for simple static sites, while Blob Storage charges only for storage and data transfer. Remember the memory tip: if there is no server-side code, skip the compute and stick with storage.
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 developer wants to host a static website with HTML, CSS, and JavaScript files. Which Azure service is the MOST cost-effective option?
Why wrong: App Service is designed for dynamic web applications — using it for static content incurs unnecessary cost for compute that does no processing.
B
Azure Blob Storage static website hosting
Blob Storage's static website feature serves static content at minimal cost — just storage and bandwidth, no compute charges.
C
Azure Virtual Machines
Why wrong: VMs running a web server are the most expensive option for hosting static content — requires VM compute, OS management, and web server.
D
Azure Kubernetes Service
Why wrong: AKS is for containerized applications — vastly over-engineered and expensive for a simple static website.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Blob Storage static website hosting
Azure Blob Storage static website hosting is the most cost-effective option because it allows you to serve static content (HTML, CSS, JavaScript) directly from a storage container at a fraction of the cost of compute-based services. There is no need to provision or pay for virtual machines, app service plans, or orchestration layers, as the content is served via HTTP from Azure's highly durable and low-cost blob storage infrastructure.
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 App Service
Why it's wrong here
App Service is designed for dynamic web applications — using it for static content incurs unnecessary cost for compute that does no processing.
✓
Azure Blob Storage static website hosting
Why this is correct
Blob Storage's static website feature serves static content at minimal cost — just storage and bandwidth, no compute charges.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Virtual Machines
Why it's wrong here
VMs running a web server are the most expensive option for hosting static content — requires VM compute, OS management, and web server.
✗
Azure Kubernetes Service
Why it's wrong here
AKS is for containerized applications — vastly over-engineered and expensive for a simple static website.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume Azure App Service is the default choice for any website, overlooking that static content does not require a runtime environment, making blob storage the far more economical and architecturally appropriate option.
Detailed technical explanation
How to think about this question
Azure Blob Storage static website hosting works by enabling a 'static website' property on a general-purpose v2 storage account, which automatically serves files from the `$web` container over an Azure-provided endpoint (e.g., `https://<storage-account-name>.z6.web.core.windows.net`). Under the hood, it leverages Azure's content delivery network (CDN) integration for global low-latency access, and supports custom domains and HTTPS via Azure CDN or Azure Front Door, all while charging only for storage and data transfer, not compute hours.
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
A startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
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 Blob Storage static website hosting — Azure Blob Storage static website hosting is the most cost-effective option because it allows you to serve static content (HTML, CSS, JavaScript) directly from a storage container at a fraction of the cost of compute-based services. There is no need to provision or pay for virtual machines, app service plans, or orchestration layers, as the content is served via HTTP from Azure's highly durable and low-cost blob storage infrastructure.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.