What is a best practice when unit testing a controller? (Choose two.)

A custom field Exec_Count_c of type Number is created on an Account object. An account record with value of "1" for a: Exec_Count_c is saved. A workflow field update is defined on the Exec_Count_c field, to increment its value every time an account record is created or updated. The following trigger is defined on the account: trigger ExecOrderTrigger on Account (before insert, before update, after insert, after update) { for (Account accountInstance: Trigger.New) { if (Trigger . isBefore) { accountInstance . Exec_Count_c +=l; System. debug (accountInstance . Exec_Count_c); } } } What is printed from the System.debug statement?
Output from System.debug in every iteration is separated with a delimiter.

Consider the above trigger intended to assign the Account to the manager of the Account''s region. Which two changes should a developer make in this trigger to adhere to best practices? Choose 2 answers

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 blacklisted domains. The list of blacklisted 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?

Choose the correct definition for <apex:message>