Observer Pattern Quiz

Q1. Which intent best describes the Observer pattern? Define a one-to-many dependency so that when one object changes state all dependents are notified
Provide a surrogate for another object to control access to it
Separate construction from representation
Allow an object to alter its behavior when its internal state changes

Q2. Which of these is NOT a participant in the classic Observer UML? Subject
ConcreteObserver
EventDispatcher
Observer

design-patterns