Design Patterns

Question 1

Reusable solutions to common software design problems.

Answer 1

Design Patterns

Question 2

Ensures that a class has only one instance and provides a global point of access to it

Answer 2

Singleton pattern

Question 3

Creates objects without specifying the exact class to create

Answer 3

Factory Pattern

Question 4

defines a one-to-many dependency between objects so that when one object changes state all is dependents are notified and updated automatically

Answer 4

Observer Pattern