A developer is tasked with ensuring that email addresses entered into the system for Contacts and for a Custom Object called Survey_Response_ _c do not belong to a list of blocked domains. The list of blocked domains will be stored in a custom object for ease of maintenance by users. Note that the Survey_Response_ _c object is populated via a custom Visualforce page.
What is the optimal way to implement this?

• A.Implement the logic in a Validation Rule on the Contact and a Validation Rule on the Survey_Response_ _c object
• B.Implement the logic in a helper class that is called by an Apex trigger on Contact and from the Custom Visualforce page controller
• C.Implement the logic in the Custom Visualforce page controller and call that method from an Apex trigger on Contact
• D.Implement the logic in an Apex trigger on Contact and also implement the logic within the Custom Visualforce page controller

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Which technique can run logic when an Aura Component is loaded?

• A.Use the connectedCallback(0 method.
• B.Use an aura:handler 'init'' event to call a function.
• C.Call $A. enqueueAction passing in the method to call.
• D.Use the standard doinit function in the controller.

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A developer has a Debug method within a class, which is invoked hundreds of times. What is the optimal functionality in the Developer Console to count the number of calls made to the method?

• A.The "Execution Tree" tab under the Stack Tree Panel.
• B.The "Executed Units" tab under the Execution Overview Panel.
• C.The "Execution Stack" Panel.
• D.The "Execution Log" Panel.

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When calling a RESTful web service, a developer receives a JSON payload that has a data hierarchy that is nested three levels deep. How can the developer describe the external data?

• A.Use middleware to flatten the JSON and consume it as a new custom object.
• B.Declare a class with three levels and deserialize the JSON typed with this class.
• C.Use the ANT migration tool, the custom metadata API, or the Dataloader.
• D.Deserialize the data untyped and then process it.

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A customer has a single Visualforce page that allows each user to input up to 1500 sales forecasts and instantly view pivoted forecast calculations. Users are complaining that the page is loading slowly, and they are seeing error messages regarding heap and view state limits.
What are three recommendations to optimize page performance? (Choose three.)

• A.Implement pagination and reduce records per page
• B.Use JavaScript Remoting instead of controller actions
• C.Create formula fields to compute pivoted forecast calculations
• D.Specify the list of sales forecasts as transient
• E.Segregate calculation functionality from input functionality

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