PL-900 Demonstrate the capabilities of Power Apps Practice Question
A company uses Microsoft Power Apps to build a leave request application. The app uses SharePoint as the data source. Users report that when they submit a leave request, the app sometimes fails to save the data and shows a generic error. Which should you investigate first?
⚠ Common exam trap
PL-900 often tests the misconception that generic save errors are caused by formula syntax or delegation, when the first and most common cause is a broken or expired data source connection.
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
✓
Verify the connection to the SharePoint data source.
When a Power Apps app fails to save data to SharePoint and shows a generic error, the first thing to investigate is the connection to the SharePoint data source, because a broken or expired connection is the most common cause of save failures. Verifying the connection ensures the app can authenticate and communicate with SharePoint before investigating more complex issues like delegation or formulas.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Clear the browser cache and cookies.
Why it's wrong here
Clearing browser cache removes locally stored data but cannot resolve intermittent save failures caused by the app's data operations against SharePoint. It tempts as a generic first-line fix for stale UI behaviour, yet the symptom is server-side write failure, so the data connection and formulas warrant investigation first.
- ✓
Verify the connection to the SharePoint data source.
Why this is correct
A stale or broken SharePoint connection is the most common cause of intermittent save failures with generic errors. Verifying the connector's authentication and permissions directly addresses the data-write failure described in the stem before investigating formulas or app logic.
- ✗
Check if the app uses delegation for large lists.
Why it's wrong here
Delegation affects how filters and queries are translated to SharePoint; it causes incomplete or missing results, not failures when writing a new record. It tempts because delegation is a common SharePoint data-source pitfall, but it governs retrieval, so it does not explain a save operation returning a generic error.
- ✗
Review the app formulas for syntax errors.
Why it's wrong here
Syntax errors would prevent the app from running or saving in the editor, and would fail consistently rather than intermittently. It tempts because formula mistakes are a frequent canvas app problem, yet a generic error on submit points to the data connection or required-field handling instead.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
This PL-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the PL-900 exam.