SOLID Design Pattern

Question 1

What does SOLID Stand for?

Answer 1

S - Single Responsibility
O - Open/Closed Principle
L - Liskov Substitution
I - Interface Segregation
D - Dependency Inversion

Question 2

Define what the Single Responsibility Principle stands for

Answer 2

Following this principle means that each class only does one thing and every class or module is responsible for one part of the software’s functionality

Question 3

Define what the Open/Closed Principle stands for.

Answer 3

“You should be able to extend a class’s behavior without modifying it.”

Your class complies with this principle if it is:

1. Open for extension, meaning that the class’s behavior can be extended; and
2. Closed for modification, meaning that the source code is set and cannot be changed.

Question 4

Define what the Liskov Substitution Principle stands for.

Answer 4

By following this principle you adhere to the following rule:

If for each object O1 of type S there is an object O2 of type T such that for all programs P defined in terms of T, the behavior of P is unchanged when O1 is substituted for O2 then S is a subtype of T.