Describe Techniques to Maximize Code Re-Use with Visualforce. PLATFORM-DEVELOPER-II Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   Which scenario best illustrates composition in Visualforce?

   • AA page uses a single large controller with all logic
   • BA controller class inherits from another controller class
   • CA page includes multiple custom components that each handle a specific part of the UI
   • DA page extends a base page using inheritance
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2. 12foundation · easy

   How can a parent Visualforce page pass a value to a custom component?

   • ABy directly accessing the component's controller
   • BBy using a static method in the component
   • CBy using a global variable
   • DBy setting an attribute on the component tag
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4. 13foundation · easy

   In Visualforce development, what does the principle of 'composition over inheritance' encourage?

   • ACreating deep class hierarchies to share code
   • BCopying code between pages to avoid dependencies
   • CBuilding complex functionality by combining simpler, reusable components
   • DUsing only standard controllers and no custom code
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5. 14application · medium

   A developer is creating a custom component to display a progress bar. The component will be used on several pages, each with a different maximum value and color scheme. What should the developer do to make the component configurable?

   • AHard-code the maximum value and color in the component so all pages look consistent.
   • BUse a global variable in Apex to store the configuration for all pages.
   • CDefine attributes for the current value, maximum value, and color, and reference them in the component's markup.
   • DCreate a separate component for each color scheme and maximum value.
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6. 15foundation · easy

   What is a common technique for a custom component to notify its parent page of an event?

   • AUsing JavaScript to call the parent's controller
   • BUsing a custom object to store events
   • CWriting directly to the parent's view state
   • DUsing an action method attribute that the parent sets
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