PL-900 Demonstrate the capabilities of Power Apps Practice Question
An organization needs to create a form for employees to submit vacation requests. The form should automatically calculate the number of days requested based on the start and end dates. Which type of app should they build?
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 allow flexible formulas, such as DateDiff, to automatically calculate the number of days between two dates, making them ideal for forms requiring custom calculations. Option A is wrong because Power Apps portal is designed for external-facing websites, not internal employee forms. Option C is wrong because Power Automate is an automation tool, not a form-building app. Option D is wrong because model-driven apps use standardized forms and custom calculations are less straightforward compared to canvas apps.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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Power Apps portal
Why it's wrong here
A Power Apps portal publishes an externally facing website for anonymous or authenticated users outside the organisation; employees submitting internal requests need a canvas app instead. It is tempting because portals genuinely suit customer self-service and public-facing scenarios, but they are not the vehicle for internal form-based data capture.
- ✓
Canvas app
Why this is correct
Canvas apps give full control over the layout and formulas, so the analyst can add date pickers and a calculated label using DateDiff to derive the number of days between start and end dates, satisfying the automatic calculation requirement.
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Power Automate
Why it's wrong here
Power Automate orchestrates flows and approvals; it cannot render the input form employees fill in, nor compute values as they type. It is tempting because it genuinely handles the downstream approval routing after submission, but the form itself and its date calculation must be built in a canvas app.
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Model-driven app
Why it's wrong here
Model-driven apps generate UI from the Dataverse data model and cannot compute a days-requested value from start and end dates without added logic. It is tempting because model-driven apps excel for complex, relationship-heavy business processes, but a simple calculated form is the natural fit for canvas apps.
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