Given a Set of Requirements, Describe the Process for Designing Lightning Components. PLATFORM-DEVELOPER-II Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A developer is designing a Lightning component that needs to perform a complex calculation involving multiple records and then display the result. The calculation cannot be done with SOQL alone and requires Apex. What is the recommended pattern for calling Apex from the component?

   • AUse a wire adapter to call the Apex method, which automatically caches the result.
   • BUse a component event to trigger the Apex method from the parent component.
   • CCall the Apex method imperatively and handle the result in a callback function.
   • DUse a custom label to store the calculation logic and call it from the component.
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2. 12foundation · easy

   Which practice is recommended to optimize the performance of a Lightning component that displays a list of records?

   • AUse a component event to refresh the list after each change
   • BMake a separate Apex call for each record to display
   • CUse pagination or lazy loading to fetch only the records that are currently visible
   • DLoad all records in the component's init handler
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4. 13application · medium

   A team is building a Lightning component to display and edit a single Account record. The component must be lightweight and avoid unnecessary server calls. Which approach is most aligned with Lightning Data Service best practices?

   • AUse an Apex controller with a @AuraEnabled method to query and update the Account record.
   • BUse lightning-record-form with the recordId and specified fields to display and edit the record.
   • CUse getRecord with a wire adapter to load the record, and use updateRecord to save changes.
   • DUse getRecord with a wire adapter and then call saveRecord from the record object.
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5. 14foundation · easy

   A developer is designing a Lightning component that will be used in multiple places across the org, each time with different data and configuration. What is the BEST component architecture approach?

   • ACreate a reusable building block component that accepts configuration via attributes and can be composed into larger components
   • BCreate a separate component for each use case to avoid any coupling
   • CCreate a composed component that includes all possible features and hides them based on configuration
   • DCreate a single standalone component that contains all the logic and markup
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6. 15foundation · easy

   What is a common technique to reduce server round-trips in a Lightning component?

   • AUse synchronous Apex calls to speed up the response
   • BCache data client-side and reuse it across interactions
   • CUse multiple Apex methods to handle different actions
   • DAvoid using Lightning Data Service and use raw Apex instead
   Reveal Solution Discussion Select an answer first