S.O.L.I.D. Principles

Question 1

Single-Responsibility Principle

Answer 1

A class should have one and only one reason to change, meaning that a class should have only one job.

Question 2

Open-Closed Principle

Answer 2

Objects or entities should be open for extension but closed for modification

Question 3

Liskov Substitution Principle

Answer 3

Let q(x) be a property provable about objects of x of type T. Then q(y) should be provable for objects y of type S where S is a subtype of T. *Rewrite this into English

Question 4

Interface Segregation Principle

Answer 4

A client should never be forced to implement an interface that it doesn’t use, or clients shouldn’t be forced to depend on methods they do not use.

Question 5

Despendency Inversion Principle

Answer 5

Entities must depend on abstractions, not on concretions, It states that the high-level module must not depend on the low-level module, but they should depend on abstractions.