Which approach should be used to provide test data for a test class?

A platform developer at Universal Containers needs to create a custom button for the Account object that, when clicked, will perform a series of calculations and redirect the user to a custom Visualforce page.
Which three attributes need to be defined with values in the <apex:page> tag to accomplish this? (Choose three.)

For which three items can a trace flag be configured? (Choose three.)

A developer creates a Workflow Rule declaratively that updates a field on an object. An Apex update trigger exists for that object. What happens when a user updates a record?

Which two statements are true about Apex code executed in Anonymous Blocks? Choose 2 answers