Given a Set of Requirements, Describe the Process for Designing Lightning Components. PLATFORM-DEVELOPER-II Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which SLDS utility class is commonly used to create a responsive grid layout in a Lightning component?

   • Aslds-card
   • Bslds-button
   • Cslds-grid
   • Dslds-container
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2. 22foundation · easy

   Which tool is commonly used to debug Lightning components in the browser?

   • AApex Test Execution
   • BSalesforce Inspector
   • CChrome DevTools
   • DWorkbench
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4. 23expert · hard

   A Lightning component displays a dashboard with multiple data panels. Each panel loads data from a different Apex method. The component currently calls all Apex methods on init, causing slow initial load. The team wants to improve perceived performance without changing the data requirements. Which approach is best?

   • ACache the data in a static variable on the Apex controller.
   • BUse a wire adapter for each panel to load data reactively.
   • CUse a single Apex method that returns all data for all panels in one call.
   • DLoad the most critical panel first, then load the remaining panels asynchronously.
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5. 24application · medium

   A developer is writing a Lightning component that calls an Apex method to save data. The developer wants to ensure the Apex method is testable. Which practice is most important?

   • AUse the Lightning Testing Service to test the component's UI.
   • BAdd debug statements in the Apex method to trace the execution.
   • CUse the browser's developer console to test the component's JavaScript.
   • DWrite Apex unit tests that cover the method's logic, including success and failure paths.
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6. 25expert · hard

   A developer is building a Lightning component that will be used on a record page. The component must be responsive and accessible, and it must work on both desktop and mobile. The component includes a custom table. What is the best approach?

   • AUse a standard HTML table with custom CSS for responsiveness.
   • BUse a lightning-datatable component, which provides built-in responsiveness and accessibility.
   • CUse a fixed-width table to ensure consistent appearance.
   • DUse SLDS classes for the table and ensure it is keyboard navigable and has proper ARIA roles.
   Reveal Solution Discussion Select an answer first