Study Guide
Question 1:
Proxy
Only one object of a Class should exist.
Observer
The ability to treat a whole and each of
its parts and subparts in a uniform way.
Strategy
Attach additional responsibilities to an
object dynamically.
Composite
Define a one‐to‐many dependency
between objects so that when an object
changes state, all of its dependents are
notified and updated automatically.
Factory Object (Abstract Factory)
Allow an object to change its behavior
when its internal state changes.
Singleton
Allow an algorithm to vary
independently from the clients using it.
Decorator
Provide a surrogate or placeholder for
another object to control access to it.
State
A method that manufactures objects of a
particular type.
Factory Method
An object that encapsulates factory
methods.
Answer:
Proxy
Provide a surrogate or placeholder for
another object to control access to it.
Observer
The ability to treat a whole and each of
its parts and subparts in a uniform way.
