Describe the Common Performance Issues for User Interfaces and the Techniques to Mitigate Them. PLATFORM-DEVELOPER-II Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is a key characteristic of a selective SOQL query that improves UI performance?

   • AIt queries without a WHERE clause
   • BIt retrieves all fields of an object
   • CIt uses an indexed field in the WHERE clause
   • DIt uses a non-selective filter on a large object
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   Which technique leverages browser caching to improve client-side rendering performance?

   • AUsing static resources for JavaScript and CSS
   • BInlining all CSS in the component
   • CMaking synchronous Apex calls
   • DUsing dynamic JavaScript generation
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which tool is commonly used to test and monitor UI performance in Salesforce?

   • AApex Test Framework
   • BChrome DevTools
   • CSalesforce CLI
   • DData Loader
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5. 9foundation · easy

   A developer is troubleshooting a slow Lightning component. Which of the following is a common root cause of UI performance issues?

   • AUsing pagination
   • BUsing Lightning Data Service
   • CInefficient SOQL queries
   • DLazy loading of components
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6. 10application · medium

   A developer is building a Lightning Web Component that displays a chart. The chart data is static and changes rarely. Which technique should be used to improve performance?

   • AFetch the chart data from the server every time the component loads.
   • BUse a complex SOQL query to retrieve the data.
   • CCache the chart data in a static resource or use a client-side cache.
   • DUse a JavaScript library that renders the chart on every data change.
   Reveal Solution Discussion Select an answer first