Optimize and Troubleshoot Apps PL-400 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A model-driven app's main form for the Account table takes several seconds to load. The form contains 20 fields, 5 subgrids, and 3 quick view forms. Users only need to view the account name, phone, and primary contact. You need to improve the form load time while keeping the ability to see related records. What should you do?

   • ARemove the subgrids and quick view forms from the form and add them to a separate form that users can navigate to.
   • BMove the subgrids to the top of the form and the quick view forms to the bottom.
   • CIncrease the number of rows displayed in each subgrid to 50.
   • DChange the form to use a read-only form and disable all fields.
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2. 7application · medium

   A canvas app uses a SQL Server data source. The app has a gallery that displays orders for the current user. The gallery's Items property is: Filter(Orders, UserID = User().Email). Users report that the gallery is slow. You suspect the query is not delegated. What should you do?

   • AChange the Filter() to use the 'in' operator instead of the equality operator.
   • BPre-load all orders into a collection in OnStart and filter the collection.
   • CEnsure the UserID column is indexed in the SQL table and that the Filter() uses a column that supports delegation.
   • DUse the Monitor tool to confirm delegation, then increase the data row limit to 5000.
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4. 8application · medium

   A canvas app is throwing an error only for some users. The error message is generic and does not indicate the cause. You need to identify the specific operation that fails and the error details. What should you do first?

   • AReview the app's version history to see recent changes.
   • BAsk the users to clear their browser cache and try again.
   • CAdd a notification control to display the error message on the screen.
   • DUse the Monitor tool while reproducing the error to inspect the network calls and error details.
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5. 9expert · medium

   A canvas app is slow when loading a gallery that displays records from a SharePoint list. The Monitor tool shows that the query is non-delegated and retrieves all 10,000 items. You need to improve performance, but the app must still allow users to search across all items. What should you do?

   • AUse the Monitor tool to identify the non-delegated query, then change the data source to a SQL Server table.
   • BIncrease the data row limit in the app settings to 20,000.
   • CPre-load all items into a collection in OnStart and filter the collection.
   • DChange the gallery's Items property to use a delegated query with StartsWith on a text column, and add a search box that uses the same delegated filter.
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6. 10foundation · easy

   Which of the following is a benefit of using delegated queries in a canvas app?

   • AIncreases the maximum number of records that can be displayed in a gallery
   • BReduced data transfer because only matching records are sent to the client
   • CAllows the app to work offline without any data
   • DEliminates the need for any data source connection
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