The answer is Microsoft 365, which is the correct choice because it exemplifies Software as a Service (SaaS) by delivering fully managed productivity applications like Word, Excel, and Teams over the internet. In a SaaS model, the provider handles all underlying infrastructure, operating systems, and updates, so you simply log in and use the software without managing servers or runtime environments. On the Azure Fundamentals AZ-900 exam, this concept tests your ability to distinguish between cloud service models: SaaS (ready-to-use software), PaaS (platform for development), and IaaS (virtualized infrastructure). A common trap is confusing Microsoft 365 with Azure services like virtual machines (IaaS) or SQL Database (PaaS), but remember that SaaS focuses on end-user applications you consume, not build upon. For a quick memory tip, think of “SaaS for your seat” — you pay for a seat license to use the software, not to manage the stack beneath it.
AZ-900 Describe cloud concepts Practice Question
This AZ-900 practice question tests your understanding of describe cloud concepts. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Which of the following is an example of a SaaS (Software as a Service) offering from Microsoft?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft 365
Microsoft 365 is a SaaS offering because it provides ready-to-use productivity applications (e.g., Word, Excel, Teams) accessed via a web browser or client, with Microsoft managing the underlying infrastructure, operating system, and application updates. The customer simply consumes the software without needing to install or maintain servers or runtime environments.
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 Virtual Machines
Why it's wrong here
Azure VMs are IaaS — customers manage the OS and applications on cloud-provided virtual servers.
✗
Azure App Service
Why it's wrong here
App Service is PaaS — customers deploy their applications on a managed platform.
✓
Microsoft 365
Why this is correct
Microsoft 365 is SaaS — Microsoft manages everything; users just access the application.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure SQL Database
Why it's wrong here
Azure SQL Database is PaaS — customers manage their database data and schema on a managed platform.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse PaaS (like Azure App Service or Azure SQL Database) with SaaS, because both are 'managed' services, but PaaS still requires the customer to manage application code or database schemas, whereas SaaS provides a fully finished application ready for end-user consumption.
Detailed technical explanation
How to think about this question
Under the hood, SaaS like Microsoft 365 uses multi-tenant architecture where a single instance of the application serves multiple customers, with data isolation enforced at the application layer (e.g., tenant IDs in Azure Active Directory). Real-world scenario: a company using Microsoft 365 does not need to patch Exchange Server or manage SharePoint farm updates—Microsoft handles all OS-level and application-level patching, load balancing, and failover, while the customer only manages user licenses and data retention policies.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft 365 — Microsoft 365 is a SaaS offering because it provides ready-to-use productivity applications (e.g., Word, Excel, Teams) accessed via a web browser or client, with Microsoft managing the underlying infrastructure, operating system, and application updates. The customer simply consumes the software without needing to install or maintain servers or runtime environments.
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
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Variation 1. What is Software as a Service (SaaS)?
easy
A.A model where customers manage their own virtual machines and applications
✓ B.A model where the provider delivers complete software applications managed entirely by the provider
C.A model where customers deploy their code on provider-managed platforms
D.A model where customers rent physical hardware from the provider
Why B: Software as a Service (SaaS) is a cloud computing model where the provider hosts and manages the entire software application, including the underlying infrastructure, middleware, and data. Customers access the application over the internet (typically via a web browser or API) without needing to install, maintain, or update anything locally. This model shifts all operational responsibility to the provider, making it the most 'hands-off' cloud service model for the customer.
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Question Discussion
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