Describe the Messaging Techniques and Best Practices When Displaying Errors in User Interfaces. PLATFORM-DEVELOPER-II Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   Which error messaging technique is best suited for displaying a validation error that is directly associated with a specific input field?

   • ASystem status message
   • BToast notification
   • CModal dialog
   • DInline message
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2. 17application · medium

   A developer is building a custom Lightning component that uses `lightning:recordEditForm` to edit an account record. When the user submits the form, the server returns a validation error on the 'Industry' field. How should the developer display this error?

   • AUse the `onerror` handler to display a toast with the error message.
   • BLet `lightning:recordEditForm` handle the error automatically, as it displays inline errors by default.
   • CCatch the error in the `onerror` handler and display it in a modal dialog.
   • DUse `force:showToast` to display the error message.
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4. 18application · medium

   A developer is building a custom Lightning component that displays a list of opportunities. When the user clicks a button to refresh the list, the server returns an error. The developer wants to show the error without disrupting the user's current view. Which messaging technique is most appropriate?

   • AA modal dialog with the error details.
   • BA toast notification with the error message.
   • CAn inline message at the top of the list.
   • DA browser alert() with the error message.
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5. 19application · medium

   A developer is creating a custom Lightning component for a multi-step wizard. On step 3, the user submits the form and the server returns a generic error. The developer wants to show an error that is clear and actionable. Which message is the best example of a clear, actionable error message?

   • AAn error occurred. Please try again later.
   • BInvalid input. Check your entries.
   • CError code 500: Internal Server Error.
   • DThe email address you entered is not valid. Please use the format name@example.com.
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6. 20application · medium

   A developer is building a custom Lightning component that uses `lightning:input` fields. The developer wants to perform client-side validation before calling the server. Which approach is the best practice?

   • AUse a toast notification to display validation errors.
   • BUse the `reportValidity()` method on the form to trigger validation.
   • CUse the `showHelpMessageIfInvalid()` method on each `lightning:input` after setting custom validity.
   • DUse the `required` attribute on each `lightning:input` and rely on the built-in validation.
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