A developer has a Apex controller for a Visualforce page that takes an ID as a URL parameter. How should the developer prevent a cross site scripting vulnerability?

Which action causes a before trigger to fire by default for Accounts?

Which two statements are true about using the @testSetup annotation in an Apex test class?
Choose 2 answers

A company has a custom object, Sales, }_Help_Request__c, that has a Lookup relationship to Opportunity.
The Seles Help Request__c has a mumber field, Number_ct_Hours__c, that represents the amount of time spent on the Sales_Help Request__C.
A developer is tasked with creating a field, total_Hour2__c, on Opportunity that should be the sum of all of the Number_of_Hours_c values for the Sales_Help_Request__c records related to that Opportunity.
What should the developer use to implement this?

What are two ways for a developer to execute tests in an org?