As a part of class implementation a developer must execute a SOQL query against a large data ser based on the contact object. The method implementation is as follows.

Which two methods are best practice to implement heap size control for the above code? (Choose 2 Answers)

Which two are phases in the Salesforce Application Event propagation framework? Choose
2 answers

A newly hired developer discovers that there are multiple triggers on the case object.
What should the developer consider when working with triggers?

A developer created a Visualforce page with a custom controller to show a list of accounts. The page uses the
<apex:SelecList> component, with a variable called "selection", to show the valid values for Account.Type.
The page uses an <apex:pageBlockTable> component to display the list of accounts, where the iteration variable is "acct". The developer wants to ensure that when a user selects a type on the <apex : selectList> component, only accounts with that type are shown on the page. What should the developer do to accomplish this?

Which three statements are true regarding custom exceptions in Apex? (Choose three.)