PL-900 Demonstrate the capabilities of Power Apps Practice Question
An organization uses a Canvas app to capture customer feedback. The app writes data to a Dataverse table. Recently, users have been submitting duplicate records due to double-clicking the submit button. What is the best way to prevent duplicates?
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
✓
Disable the submit button after the first click using the DisplayMode property
Disabling the submit button after the first click using the DisplayMode property prevents duplicate submissions by ensuring the button cannot be clicked again. Option A is not feasible because requiring a unique ID before submission would change the data entry process and does not address the double-click issue directly. Option C is incorrect because a business rule in Dataverse runs after submission, so it would not prevent duplicates from the same double-click. Option D is incorrect because a Power Automate flow to delete duplicates after creation does not prevent the duplicates from being submitted in the first place.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Set the form to require a unique ID before submission
Why it's wrong here
Unique IDs are often auto-generated; this doesn't prevent double-click.
- ✓
Disable the submit button after the first click using the DisplayMode property
Why this is correct
Setting DisplayMode to Disabled immediately after click prevents further submissions.
- ✗
Add a business rule to check for duplicates before saving
Why it's wrong here
Business rules run client-side but cannot prevent the second submission if the first is not yet saved.
- ✗
Use a Power Automate flow to delete duplicates after creation
Why it's wrong here
This handles duplicates after they happen, not prevent them.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.