Exam PDI Topic 4 Question 97 Discussion

Answer A is correct. Aura components use component bundles that separate controller, helper, renderer, style, and design resources. Client-side controller and helper JavaScript coordinate UI events and server actions, while application and component events follow the framework's event propagation model. Good Aura design keeps reusable logic in helpers and avoids unnecessary application-wide events. The other options either use the wrong platform feature, apply at the wrong layer, or ignore a key Salesforce constraint. For Platform Developer I, the important point is not just syntax; it is choosing the feature that aligns with transaction behavior, security enforcement, maintainability, and supported metadata capabilities. Reference focus:
Lightning Web Components Developer Guide, Lightning Component Reference, Aura Components Developer Guide, and Visualforce Developer Guide. This distinction is important in production orgs because small design mistakes can create deployment failures, runtime exceptions, data-quality defects, or user-visible security gaps once automation is executed in bulk or from multiple entry points.