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 sales team wants to build a custom inventory tracking application with minimal code. They need a cloud-based database that can securely store structured data and integrate with the low-code app builder. Which Microsoft 365 service should they use as the database backend?
Why wrong: Microsoft Lists is suitable for simple list tracking but does not offer the relational database capabilities, advanced security, and low-code integration that Dataverse provides for custom business apps.
B
Power Apps
Why wrong: Power Apps is the low-code application platform used to build the app, but it requires a data source (like Dataverse) to store and retrieve data.
C
Microsoft Dataverse
Dataverse provides a secure, scalable database that stores structured business data. It is designed to be the data backend for Power Apps, making it the correct choice for this scenario.
D
Power Automate
Why wrong: Power Automate is a workflow automation tool, not a database. It can act on data but does not store it.
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 is the correct choice because it provides a scalable, cloud-based relational database that securely stores structured data and integrates natively with Power Apps, the low-code app builder. Unlike simpler list-based storage, Dataverse supports rich data types, relationships, business logic, and role-based security, making it ideal for custom inventory tracking applications built with minimal code.
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 Lists
Why it's wrong here
Microsoft Lists is suitable for simple list tracking but does not offer the relational database capabilities, advanced security, and low-code integration that Dataverse provides for custom business apps.
✗
Power Apps
Why it's wrong here
Power Apps is the low-code application platform used to build the app, but it requires a data source (like Dataverse) to store and retrieve data.
✓
Microsoft Dataverse
Why this is correct
Dataverse provides a secure, scalable database that stores structured business data. It is designed to be the data backend for Power Apps, making it the correct choice for this scenario.
Related concept
Read the scenario before looking for a memorised answer.
✗
Power Automate
Why it's wrong here
Power Automate is a workflow automation tool, not a database. It can act on data but does not store it.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Lists (a simple list tool) with a proper database backend, or mistakenly think Power Apps or Power Automate can serve as data storage, when in fact they are application and automation layers that require a separate data source like Dataverse.
Detailed technical explanation
How to think about this question
Dataverse uses a metadata-driven architecture where entities, attributes, and relationships are defined in a common data model, enabling automatic generation of RESTful APIs (via the Web API) and OData endpoints for seamless integration. Under the hood, it leverages Azure SQL Database for storage, providing ACID transactions, indexing, and built-in auditing. In a real-world scenario, a sales team could define an 'Inventory' entity with fields for product name, quantity, and location, then use Power Apps to build a canvas app that reads and writes to Dataverse with minimal code, while Power Automate flows handle notifications when stock levels drop below a threshold.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-900 question in full detail.
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 is the correct choice because it provides a scalable, cloud-based relational database that securely stores structured data and integrates natively with Power Apps, the low-code app builder. Unlike simpler list-based storage, Dataverse supports rich data types, relationships, business logic, and role-based security, making it ideal for custom inventory tracking applications built with minimal code.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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