Describe the Messaging Techniques and Best Practices When Displaying Errors in User Interfaces. PLATFORM-DEVELOPER-II Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A developer is building a custom Lightning component that uses `lightning:recordEditForm` to edit an account. The developer wants to display a custom error message when the account name is blank. How should the developer implement this?

   • AUse the `required` attribute on the `lightning:input` field for the account name.
   • BUse `setCustomValidity()` and `showHelpMessageIfInvalid()` on the `lightning:input` field.
   • CUse a modal dialog to display the custom error message.
   • DUse the `onerror` handler to display a toast with the custom message.
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2. 12foundation · easy

   A developer needs to display a transient confirmation message that appears briefly and does not require user action. Which error messaging technique is most appropriate?

   • AToast notification
   • BModal dialog
   • CPage-level error banner
   • DInline message
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4. 13application · medium

   A developer is building a custom Lightning component that lets users submit an expense report. The component calls an Apex method that returns a list of field-level validation errors. The user should see each error next to the corresponding input field and be able to correct them without losing the data they already entered. Which messaging technique should the developer use?

   • ARedirect to a custom error page with the error details.
   • BShow a modal dialog with the full error list.
   • CDisplay inline messages next to each invalid field.
   • DDisplay a single toast notification listing all errors.
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5. 14application · medium

   A developer is building a custom Lightning component that allows users to create a new contact. The component has a 'Save' button. When the user clicks 'Save', the component should validate the form and show errors. Which technique is best for displaying the validation errors?

   • AShow a toast notification with a summary of all errors.
   • BShow a single inline message at the top of the form that says 'Please fix the errors'.
   • CShow inline messages next to each invalid field.
   • DShow a modal dialog with a list of all errors.
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6. 15application · medium

   A developer is building a custom Lightning component that allows users to configure a report. The configuration has multiple tabs. When the user clicks 'Run Report' on the last tab, the component should validate all tabs. If there are errors, what is the best way to display them?

   • AShow a toast notification with a summary of all errors.
   • BShow a modal dialog with a list of errors and a link to the relevant tab.
   • CShow inline messages only on the current tab.
   • DShow a single inline message at the top of the page that says 'Please fix the errors'.
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