Lightning Components Flashcards

Which tool would an administrator use to troubleshoot a Lightning component that is not rendering correctly on a page?

Answer: Lightning Component Debug Mode in Setup

Lightning Component Debug Mode, enabled in Setup, disables minification of JavaScript so errors are easier to read in the browser console.

What is the primary difference between an Aura component and a Lightning Web Component (LWC)?

Answer: LWC is based on modern web standards; Aura uses a proprietary framework

LWC is built on modern web standards (HTML, JavaScript, CSS) while Aura uses Salesforce's proprietary component model.

When assigning a Lightning Record Page to a specific record type, which step is required after saving the page in App Builder?

Answer: Activate the page and assign it to the record type and profiles

After saving, you must activate the Lightning Record Page and configure its assignment by record type and/or profile for it to take effect.

Which approach allows a Lightning component to refresh its data after a related record is updated elsewhere on the page?

Answer: Using the refreshApex function or wire adapter refresh

refreshApex is the recommended approach to re-invoke a wired Apex method and update component data when underlying records change.

What is the function of the 'lightning__RecordAction' target in an LWC metadata file?

Answer: Makes the component available as a custom quick action on record pages

The lightning__RecordAction target makes an LWC available as a custom action that can be added to record page action bars or quick action menus.

An administrator notices a Lightning component works in a sandbox but shows an error in production. What is the most likely cause?

Answer: The component was not deployed using a Change Set or other deployment tool

Lightning components must be explicitly deployed to production via Change Sets, Salesforce DX, or another deployment method — they do not automatically sync.

Which Lightning App Builder layout option best supports a component that needs to span the full width of a record page?

Answer: Full-width region or one-column layout

A full-width region or one-column layout in the Lightning App Builder provides the maximum horizontal space for a single component.