Describe the Messaging Techniques and Best Practices When Displaying Errors in User Interfaces. PLATFORM-DEVELOPER-II Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A developer is building a custom Lightning component that allows users to import leads from a CSV file. The import process can take up to 30 seconds. When the user clicks the 'Import' button, the component should provide immediate feedback that the import has started, and then show the final result. Which combination of messaging techniques should the developer use?

   • AUse a toast to show 'Import started' and then another toast for the result.
   • BDisplay an inline message that says 'Importing...' and then change it to the result.
   • CShow a spinner while the import runs, then display a toast with the result.
   • DShow a modal dialog that blocks the screen until the import completes.
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2. 2application · medium

   A developer is building a custom Lightning component that allows users to upload a file. The file must be a PDF and less than 5 MB. When the user uploads an invalid file, what is the best error message?

   • AThe file you selected is not a PDF. Please select a PDF file that is less than 5 MB.
   • BError: File upload failed.
   • CInvalid file. Please upload a valid file.
   • DThe file is too large. Please upload a smaller file.
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4. 3application · medium

   A developer is creating a custom Lightning component that calls an Apex method to save a record. The Apex method uses `addError()` on a field to indicate a validation failure. How should the developer retrieve and display this field-level error in the component?

   • ACatch the AuraHandledException and display the message in a toast.
   • BUse the `recordId` and `fieldName` from the error to display an inline message next to the field.
   • CDisplay the error in a modal dialog with the field name.
   • DParse the error message from the exception and display it in an inline message next to the field.
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5. 4foundation · easy

   When should an error message be displayed to the user?

   • AAt a time that is appropriate for the error type and user context
   • BOnly after the user submits the form, regardless of the error type
   • CAs soon as the error is detected, even if the user is in the middle of a task
   • DAfter the user leaves the page to avoid interrupting them
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6. 5application · medium

   A developer is building a custom Lightning component that allows users to submit a support case. The submission process involves multiple steps, and the developer wants to show a success message after the case is created. Which messaging technique is best for the success message?

   • AA toast notification that says 'Case created successfully'.
   • BA modal dialog that says 'Case created successfully' with an OK button.
   • CAn inline message at the top of the form that says 'Case created successfully'.
   • DA browser alert() that says 'Case created successfully'.
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