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 is stored in a custom object for ease of maintenance by users. 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 validation rules on the Contact and the Survey_Response__c objects.
• B. Implement the logic in an Apex trigger on Contact and also implement the logic within the custom Visualforce page controller.
• C. Implement the logic in a helper class that is called by an Apex trigger on Contact and from the custom Visualforce page controller.

To avoid duplicating code and improve maintainability, how should Universal Containers implement an API integration for code reuse?

• A. Store the API integration code as a static resource and reference it in each Apex class.
• B. Use a separate Apex class for each API endpoint to encapsulate the integration logic.
• C. Include the API integration code directly in each Apex class that requires it.
• D. Create a reusable Apex class for the API integration and invoke it from the relevant Apex classes.

Universal Containers implements a private sharing model for Convention_Attendee__c. A lookup field Event_Reviewer__c was created. Management wants the event reviewer to automatically gain Read/Write access to every record they are assigned to. What is the best approach?

• A. Create a before insert trigger on the Convention Attendee custom object, and use Apex Sharing Reasons and Apex Managed Sharing.
• B. Create an after insert trigger on the Convention Attendee custom object, and use Apex Sharing Reasons and Apex Managed Sharing.
• C. Create criteria-based sharing rules on the Convention Attendee custom object to share the records with the Event Reviewers.
• D. Create a criteria-based sharing rule on the Convention Attendee custom object to share the records with a group of Event Reviewers.

Given a list of Opportunity records named opportunityList, which code snippet is best for querying all Contacts of the Opportunity's Account?

• A. 20
  Java
  List <Contact> contactList = new List <Contact>();
  for ( Contact c : [SELECT Id FROM Contact WHERE AccountId IN :opportunityList.AccountId ]){ contactList.add(c);
  }
• B. Java
  List <Contact> contactList = new List <Contact>();
  Set <Id> accountIds = new Set <Id>();
  for(Opportunity o : opportunityList){
  accountIds.add(o.AccountId);
  }
  for(Account a : [SELECT Id, (SELECT Id FROM Contacts) FROM Account WHERE Id IN :
  accountIds]){
  contactList.addAll(a.Contacts);
  }

A developer wrote an Apex class to make several callouts to an external system. If the URLs used in these callouts will change often, which feature should the developer use to minimize changes needed to the Apex class?

• A. Session Id
• B. Named Credentials
• C. Connected Apps
• D. Remote Site Settings