A developer is writing a Visualforce page that queries accounts in the system and presents a data table with the results. The users want to be able to filter the results based on up to five fields. However, the users want to pick the five fields to use as filter fields when they run the page.Which feature of Apex code is required to facilitate this solution?
Universal Containers uses Big Objects to store almost a billion customer transactions called Customer_Transaction__b.These are the fields on Customer_Transaction__b:Account__c -Program__c -Points_Earned__c -Location__c -Transaction_Date__c -The following fields have been identified as Index Fields for the Customer_Transaction__b object: Account__c, Program__c, and Transaction_Date__c.Which SOQL query is valid on the Customer_Transaction__b Big Object?
Part of a custom Lightning Component displays the total number of Opportunities in the org, which is in the millions. The Lightning Component uses an ApexController to get the data it needs.What is the optimal way for a developer to get the total number of Opportunities for the Lightning Component?
A company notices that their unit tests in a test class with many methods to create many records for prerequisite reference data are slow.What can a developer to do address the issue?
A developer is asked to build a solution that will automatically send an email to the Customer when an Opportunity stage changes. The solution must scale to allow for 10,000 emails per day. The criteria to send the email should be evaluated after all Workflow Rules have fired.What is the optimal way to accomplish this?
A Visualforce page loads slowly due to the large amount of data it displays.Which strategy can a developer use to improve the performance?
