Structural Design Patterns in Modern C++ - Basic Example - Facade Design Pattern

The video tutorial introduces the concept of creating classes and a client class, explaining how to initialize and manage dependencies. It highlights the issues of tight coupling and complex interfaces, proposing a facade pattern to simplify interactions and reduce dependencies. The facade acts as an intermediary, providing a simple interface to the client while managing the complex subsystem classes. This approach ensures that changes in subsystem classes do not affect the client, promoting flexibility and maintainability.

What is the primary purpose of creating classes A, B, and C in the project?

• To showcase polymorphism

• To serve as part of a system for the client to use

• To demonstrate inheritance

• To implement complex functionalities

Why is the client class tightly coupled with classes A, B, and C?

• Because it uses smart pointers

• Because it directly uses their methods

• Because it inherits from them

• Because it does not use any pointers

What is one of the main reasons for introducing a facade in the system?

• To eliminate the need for a client class

• To directly access subsystem classes

• To convert complex interfaces into a simple one

• To increase the complexity of the system

How does the facade pattern help in reducing coupling?

• By allowing direct access to subsystem classes

• By removing the need for constructors

• By using raw pointers instead of smart pointers

• By providing a simple interface for the client

What role does the facade class play in the system?

• It serves as a base class for all other classes

• It directly implements all methods of subsystem classes

• It manages the instantiation and deletion of subsystem classes

• It replaces the client class

What is the benefit of using a facade when subsystem classes change?

• The subsystem classes become redundant

• The facade becomes obsolete

• The client remains unaffected

• The client needs to be rewritten

What is the final step in implementing the facade pattern in this project?

• Creating instances of subsystem classes

• Deleting the client class

• Invoking methods through the facade

• Rewriting the subsystem classes