PL-900 Demonstrate the capabilities of Power Apps Practice Question
A company wants to build a Power Apps app that uses a SQL Server database as its data source and requires complex business logic validation before saving data. Which type of app should they use?
⚠ Common exam trap
Candidates often confuse model-driven apps with canvas apps, assuming model-driven apps can handle complex client-side validation, when in fact model-driven apps rely on server-side business rules and cannot execute custom Power Fx logic directly on the form.
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
✓
Canvas app
Canvas apps are the correct choice because they allow full control over the user interface and can incorporate complex business logic validation using Power Fx formulas before data is written to the SQL Server database. Unlike model-driven apps, which rely on predefined forms and server-side business rules, canvas apps enable custom validation logic directly in the app's formulas, such as checking multiple field conditions or calling custom connectors.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Model-driven app
Why it's wrong here
Model-driven apps rely on business rules and workflows, not custom code.
- ✓
Canvas app
Why this is correct
Canvas apps allow complex formulas and custom validation.
- ✗
Power Automate
Why it's wrong here
Power Automate is not an app type.
- ✗
Portal
Why it's wrong here
Portals are for external-facing scenarios.
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