Design Principles

Question 1

The main goal of this principle is to minimize the effect caused
by changes

Answer 1

Encapsulate What Varies (Identify the aspects of your application that vary and
separate them from what stays the same.)

Question 2

What is encapsulation on method level?

Answer 2

You can extract the logic which will change into a separate
method, hiding it from the original method

Question 3

What is encapsulation on class level?

Answer 3

You can extract the logic which will change into a separate
class and use this class

Question 4

The main goal of this principle is to depend on abstraction rather than concrete classes

Answer 4

Program to an Interface, not anImplementation

Question 5

The main goal of this principle is to reduce inheritance herarhy and allow to replace it in runtime

Answer 5

Favor Composition Over Inheritance