Describe the Considerations When Creating Custom Controllers and Controller Extensions. PLATFORM-DEVELOPER-II Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the primary purpose of a controller extension in Visualforce?

   • ATo replace the standard controller entirely with custom logic.
   • BTo add additional functionality to an existing standard or custom controller.
   • CTo provide a way to override the standard controller's default view state handling.
   • DTo enable a page to use multiple standard controllers simultaneously.
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2. 7foundation · easy

   What is the minimum code coverage requirement for Apex classes that are deployed to production?

   • A75%
   • B100%
   • C50%
   • D85%
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4. 8foundation · easy

   Which governor limit is most likely to be impacted by a Visualforce page that queries a large number of records in a custom controller?

   • ASOQL query rows
   • BHeap size
   • CCPU time
   • DDML statements
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5. 9application · medium

   A developer is designing a Visualforce page that will be used in multiple places with slightly different behaviors. The page uses a custom controller. What is a best practice to promote reuse and maintainability?

   • APut all logic in the Visualforce page using inline Apex.
   • BUse a controller extension to add the variation-specific logic to a common custom controller.
   • CUse a single custom controller with many methods and properties to handle all variations.
   • DCreate a separate custom controller for each variation of the page.
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6. 10foundation · easy

   Which practice helps reduce view state size in a custom controller?

   • AMarking non-essential properties as transient
   • BUsing static variables to store data
   • CAvoiding the use of getters and setters
   • DStoring large data sets in public properties
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