How should a developer prevent a recursive trigger?

Which statement results in an Apex compiler error?

Which two statements are true about Getter and Setter methods as they relate to Visualforce?

Given the following Apex statement:
Account myAccount = [SELECT Id, Name FROM Account];
What occurs when more than one Account is returned by the SOQL query?

A developer has javascript code that needs to be called by controller functions in multiple components by extending a new abstract component. Which resource in the abstract component bundle allows the developer to achieve this