The answer is Software as a Service (SaaS). This is correct because the startup accesses a cloud-based email service entirely through a web browser, with the provider managing all updates, maintenance, and underlying infrastructure—eliminating the need for any local software installation. On the Microsoft Azure Fundamentals AZ-900 exam, this scenario tests your ability to distinguish SaaS from IaaS and PaaS by focusing on who manages what: in SaaS, the consumer only uses the application, while the provider handles everything else. A common trap is confusing SaaS with PaaS when a platform is mentioned, but remember that SaaS delivers ready-to-use software like Microsoft 365 or Google Workspace. For a quick memory tip, think of SaaS as “Software as a Service—you just sign in and use it, no setup required.”
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.
A startup wants to use a cloud-based email service without installing any software on their own computers. They access the service through a web browser and the provider manages all updates and maintenance. Which cloud service model does this represent?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Software as a Service (SaaS)
This scenario describes Software as a Service (SaaS) because the startup is using a fully managed cloud-based email application accessed via a web browser, with no local installation required. The provider handles all updates, maintenance, and infrastructure, which is the defining characteristic of SaaS. Examples include Microsoft 365 or Google Workspace, where the consumer only uses the software without managing the underlying platform or 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.
✗
Infrastructure as a Service (IaaS)
Why it's wrong here
IaaS provides virtualized computing resources like VMs and storage; the user manages the OS and applications.
✗
Platform as a Service (PaaS)
Why it's wrong here
PaaS provides a platform for developing and deploying applications, but the user still develops and manages the application code.
✓
Software as a Service (SaaS)
Why this is correct
SaaS delivers the entire application as a service, such as email or CRM, where the provider manages everything.
Related concept
Read the scenario before looking for a memorised answer.
✗
Anything as a Service (XaaS)
Why it's wrong here
XaaS is a general term for anything delivered as a service, but it is not a specific model like SaaS.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'accessing via a browser' with PaaS (since PaaS often provides web-based tools), but PaaS is for building and deploying applications, not for consuming a finished software product like email.
Detailed technical explanation
How to think about this question
SaaS applications are typically multi-tenant, meaning a single instance of the software serves multiple customers, with data isolation enforced at the application layer. The provider manages the entire stack—from the hypervisor and operating system to the application code—and updates are rolled out transparently to users, often using blue-green deployment or canary releases to minimize downtime. In contrast, IaaS would require the user to configure email protocols like SMTP, IMAP, and manage security patches themselves.
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: Software as a Service (SaaS) — This scenario describes Software as a Service (SaaS) because the startup is using a fully managed cloud-based email application accessed via a web browser, with no local installation required. The provider handles all updates, maintenance, and infrastructure, which is the defining characteristic of SaaS. Examples include Microsoft 365 or Google Workspace, where the consumer only uses the software without managing the underlying platform or 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.