MS-900 Describe Microsoft 365 apps and services Practice Question
This MS-900 practice question tests your understanding of describe microsoft 365 apps and services. 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 team wants to build a custom business app to track inventory with minimal custom code. They need a cloud-based database that can store structured data and is tightly integrated with the low-code app platform. Which Microsoft 365 service should they use as the database?
Dataverse is the underlying data platform for Power Platform, providing a secure, scalable database for custom business apps.
B
Microsoft SharePoint Online list
Why wrong: SharePoint lists can store data but lack the relational capabilities, scalability, and low-code integration that Dataverse offers for app development.
C
Microsoft Excel Online
Why wrong: Excel is not a proper database; it lacks concurrent user support, security controls, and integration with low-code app platforms.
D
Microsoft Forms
Why wrong: Forms is for surveys and quizzes, not for building a database-backed application.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Microsoft Dataverse
Microsoft Dataverse (formerly Common Data Service) is the cloud-scale database that stores data used by Power Apps, Power Automate, and Dynamics 365. It provides a relational data store with built-in security, business logic, and integration. Power Apps can connect directly to Dataverse to create custom apps with minimal code. SharePoint lists or Excel Online are less suitable for scalable business apps requiring relationships and business rules.
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.
✓
Microsoft Dataverse
Why this is correct
Dataverse is the underlying data platform for Power Platform, providing a secure, scalable database for custom business apps.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft SharePoint Online list
Why it's wrong here
SharePoint lists can store data but lack the relational capabilities, scalability, and low-code integration that Dataverse offers for app development.
✗
Microsoft Excel Online
Why it's wrong here
Excel is not a proper database; it lacks concurrent user support, security controls, and integration with low-code app platforms.
✗
Microsoft Forms
Why it's wrong here
Forms is for surveys and quizzes, not for building a database-backed application.
Common exam traps
Common exam trap: answer the scenario, not the keyword
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
How to think about this question
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.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
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.
Describe Microsoft 365 apps and services — This question tests Describe Microsoft 365 apps and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft Dataverse — Microsoft Dataverse (formerly Common Data Service) is the cloud-scale database that stores data used by Power Apps, Power Automate, and Dynamics 365. It provides a relational data store with built-in security, business logic, and integration. Power Apps can connect directly to Dataverse to create custom apps with minimal code. SharePoint lists or Excel Online are less suitable for scalable business apps requiring relationships and business rules.
What should I do if I get this MS-900 question wrong?
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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