Creational

Question 1

Abstract factory

Answer 1

Provide an interface for creating families of related or dependent objects without specifying their concrete classes.

Question 2

Factory method

Answer 2

Define an interface for creating an object, but let subclasses decide which class to instantiate. Let a class defer instantiation to subclasses.

Question 3

Builder

Answer 3

Separate the construction of a complex object from its representation so that the same construction process can create different representations.

Question 4

Singleton

Answer 4

Ensure a class only has one instance, and provide a global point of access to it.

Question 5

Prototype

Answer 5

Specify the kinds of objects to create using a cloneable instance and create new objects by copying this instance.