A developer is creating a test coverage for a class and needs to insert records to validate functionality. Which method annotation should be used to create records for every method in the test class?

How many accounts will be inserted by the following block ofcode? for(Integer i = 0 ; i < 500; i++) { Account a = new Account(Name='New Account ' + i); insert a; }

Given:

A developer needs to include a Visualforce page in the detail section of a page layout for the Account object, but does not see the page as an available option in the Page Layout Editor.
Which attribute must the developer include in the <apex:page> tag to ensure the Visualforce page can be embedded in a page layout?

What must the Controller for a Visualforce page utilize to override the Standard Opportunity view button?