A model-driven app is loading slowly in a web browser. You suspect that a custom script on the form is causing the delay. You need to confirm which script is taking the most time. What should you do?

Use the browser's developer tools (F12) to profile the page load and identify the script execution time.

Disable all custom scripts and re-enable them one by one.

Check the form's event handlers in the form designer.

Use the Monitor tool to view the form's data operations.

A model-driven app form for the Case table loads slowly because it includes several subgrids that each query large related tables. Users rarely need to see all subgrids at once. You need to reduce the initial load time while keeping the subgrids available. What should you do?

Move the subgrids to a tab that is collapsed by default.

Change the subgrids to display only the first 10 records.

Set the subgrids to be read-only.

Remove the subgrids from the form and add them to a different form.

A model-driven app has a view that displays all 20,000 accounts. Users report that the view is slow to load and that they rarely use the default columns. You need to improve the view's performance. What should you do?

Change the view to a chart view and display the data as a pie chart.

Increase the page size for the view to 500 records.

Add a filter to the view to limit the records returned, and remove unused columns from the view.

Set the view's default sort order to a non-indexed column.

A canvas app displays a blank gallery for several seconds after the user signs in. The gallery's Items property is set to a Filter() over a Dataverse table that has 50,000 rows. You use the browser's developer tools and see that the initial network request for the table returns all rows. You want to reduce the initial load time without changing the user experience. What should you do?

Add a loading spinner and use the Refresh() function in the OnVisible event of the screen.

Increase the data row limit in the app settings to 100,000 so the gallery can display all rows without paging.

Set the gallery's Items property to a collection that is populated by a Power Automate flow triggered on app start.

Change the gallery's Items property to use a delegated query that filters on an indexed column, and pre-load only the essential data in OnStart.

Microsoft Certified:Power Platform Developer Associate

Domain 3Objective 2

Optimize and Troubleshoot Apps PL-400 Practice Questions (Page 3)

Part of the Implement Power Apps improvements domain, which accounts for 10–15% of the PL-400 exam. Microsoft does not publish an official question count, but from its 100-minute exam (~40–65 total, ~4–10 in this domain), expect 2–5 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

6concepts

10–15%of the exam

Questions 11–15

11application · medium
A model-driven app is loading slowly in a web browser. You suspect that a custom script on the form is causing the delay. You need to confirm which script is taking the most time. What should you do?
Select an answer first
12application · medium
A model-driven app form for the Case table loads slowly because it includes several subgrids that each query large related tables. Users rarely need to see all subgrids at once. You need to reduce the initial load time while keeping the subgrids available. What should you do?
Select an answer first
13application · medium
A model-driven app has a view that displays all 20,000 accounts. Users report that the view is slow to load and that they rarely use the default columns. You need to improve the view's performance. What should you do?
Select an answer first
14application · medium
A canvas app displays a blank gallery for several seconds after the user signs in. The gallery's Items property is set to a Filter() over a Dataverse table that has 50,000 rows. You use the browser's developer tools and see that the initial network request for the table returns all rows. You want to reduce the initial load time without changing the user experience. What should you do?
Select an answer first
15foundation · easy
A canvas app uses a gallery bound to a large SharePoint list. The developer wants to ensure that filtering happens on the server rather than downloading all records to the client. What is this technique called?
Select an answer first

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Optimize and Troubleshoot Apps PL-400 Practice Questions (Page 3)

Questions 11–15

A model-driven app is loading slowly in a web browser. You suspect that a custom script on the form is causing the delay. You need to confirm which script is taking the most time. What should you do?

A model-driven app form for the Case table loads slowly because it includes several subgrids that each query large related tables. Users rarely need to see all subgrids at once. You need to reduce the initial load time while keeping the subgrids available. What should you do?

A model-driven app has a view that displays all 20,000 accounts. Users report that the view is slow to load and that they rarely use the default columns. You need to improve the view's performance. What should you do?

A canvas app uses a gallery bound to a large SharePoint list. The developer wants to ensure that filtering happens on the server rather than downloading all records to the client. What is this technique called?

Keep studying — Implement Power Apps improvements