Question 73 of 985

Describe cloud concepts →easyMultiple ChoiceObjective-mapped

MS-900 Describe cloud concepts Practice Question

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.

A company wants to provide its employees with access to email, calendar, and document editing tools through a web browser without installing any software. The provider manages all maintenance, updates, and security of the applications. Which cloud service model best describes this scenario?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

Question 1easymultiple choice

Full question →

A
Infrastructure as a Service (IaaS)
Why wrong: IaaS provides virtualized computing resources like virtual machines and storage, but the customer manages the OS, middleware, and applications. It does not deliver ready-to-use applications.
B
Platform as a Service (PaaS)
Why wrong: PaaS provides a platform for developing, deploying, and managing applications, but not end-user software like email and office tools.
C
Software as a Service (SaaS)
SaaS delivers fully functional applications over the internet, managed entirely by the provider. The customer only needs a browser to use them, which matches the scenario.
D
Desktop as a Service (DaaS)
Why wrong: DaaS delivers virtual desktop environments, enabling users to access a full desktop OS and applications from any device. It is not specifically for providing individual productivity applications as services.

Full breakdown with real-world context →

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

✓

Software as a Service (SaaS)

This scenario describes Software as a Service (SaaS) because the provider delivers fully functional applications—such as email, calendar, and document editing—over the web, with no local installation required. The provider handles all maintenance, updates, and security, which is the defining characteristic of SaaS. Examples include Microsoft 365 (Exchange Online, Outlook, Word Online) and Google Workspace.

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 virtual machines and storage, but the customer manages the OS, middleware, and applications. It does not deliver ready-to-use applications.
✗
Platform as a Service (PaaS)
Why it's wrong here
PaaS provides a platform for developing, deploying, and managing applications, but not end-user software like email and office tools.
✓
Software as a Service (SaaS)
Why this is correct
SaaS delivers fully functional applications over the internet, managed entirely by the provider. The customer only needs a browser to use them, which matches the scenario.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Desktop as a Service (DaaS)
Why it's wrong here
DaaS delivers virtual desktop environments, enabling users to access a full desktop OS and applications from any device. It is not specifically for providing individual productivity applications as services.

Common exam traps

Common exam trap: answer the scenario, not the keyword

The trap here is that candidates often confuse SaaS with PaaS because both involve managed services, but PaaS is for developers building custom applications, not for end users consuming ready-made applications like email and calendars.

Detailed technical explanation

How to think about this question

Under the hood, SaaS applications are multi-tenant, meaning a single instance of the software serves multiple customers, with data isolation enforced at the application and database layers. The provider manages the entire stack—from hypervisor to application code—and typically uses protocols like HTTPS for access and OAuth 2.0 for authentication. In a real-world scenario, Microsoft 365 uses Exchange Online for email (via MAPI over HTTPS or Outlook Web App) and SharePoint Online for document collaboration, all without the customer managing any underlying infrastructure.

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.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this MS-900 question test?

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 provider delivers fully functional applications—such as email, calendar, and document editing—over the web, with no local installation required. The provider handles all maintenance, updates, and security, which is the defining characteristic of SaaS. Examples include Microsoft 365 (Exchange Online, Outlook, Word Online) and Google Workspace.

What should I do if I get this MS-900 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

Are there clue words in this question I should notice?

Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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