This MS-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.
Your organization uses Microsoft 365 and wants to provide employees with access to corporate resources from their personal devices without managing the entire device. Which cloud service model is being used?
Infrastructure as a Service (IaaS)
Why wrong: IaaS provides virtual machines and storage.
Platform as a Service (PaaS)
Why wrong: PaaS is for application development, not end-user software.
Desktop as a Service (DaaS)
Why wrong: DaaS delivers virtual desktops, not the full Microsoft 365 suite.
Software as a Service (SaaS)
Microsoft 365 is a SaaS offering.
Answer choices
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)
Option A is correct because SaaS delivers software over the internet, accessed via subscription. Option B is wrong because PaaS provides a platform for application development. Option C is wrong because IaaS provides virtualized computing resources. Option D is wrong because DaaS delivers virtual desktops.
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.
Infrastructure as a Service (IaaS)
Why it's wrong here
IaaS provides virtual machines and storage.
Platform as a Service (PaaS)
Why it's wrong here
PaaS is for application development, not end-user software.
Desktop as a Service (DaaS)
Why it's wrong here
DaaS delivers virtual desktops, not the full Microsoft 365 suite.
Software as a Service (SaaS)
Why this is correct
Microsoft 365 is a SaaS offering.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which MS-900 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Software as a Service (SaaS) — Option A is correct because SaaS delivers software over the internet, accessed via subscription. Option B is wrong because PaaS provides a platform for application development. Option C is wrong because IaaS provides virtualized computing resources. Option D is wrong because DaaS delivers virtual desktops.
Identify which MS-900 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
This MS-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 MS-900 exam.
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