A developer must implement a CheckPaymentProcessor class that provides check processing payment capabilities that adhere to what defined for payments in the PaymentProcessor interface. public interface PaymentProcessor { void pay(Decimal amount); } Which is the correct implementation to use the PaymentProcessor interface class?

Which approach should a developer use to add pagination to a Visualforce page?

Universal Containers wants Opportunities to be locked from editing when reaching the Closed/Won stage.
Which two strategies should a developer use to accomplish this? Choose 2 answers

A visualforce page uses the contact standard controller. How can a developer display the name from the parent account record on the page?

Which code should be used to update an existing Visualforce page that uses standard Visualforce components so that the page matches the look and feel of Lightning Experience?