Behavioral Design Patterns in C++ - Slide Deck - III

The video tutorial covers the creation of a new project without using polling, focusing on the Deck class and its interaction with views. It highlights design challenges related to the Open-Closed and Dependency Inversion principles, proposing a solution by programming to an interface. The tutorial implements a flexible design using a list of views and functions like attach, detach, and notify. The Observer design pattern is introduced to promote loose coupling between the deck and views. The video concludes with a mention of unresolved issues to be discussed in the next lecture.

What is the main issue with the initial approach to running the slideshow?

• It is too slow.

• It violates the Open-Closed principle.

• It is not user-friendly.

• It uses too much memory.

Which principle is violated due to the tight coupling between the Deck and Editor view classes?

• Open-Closed Principle

• Liskov Substitution Principle

• Interface Segregation Principle

• Single Responsibility Principle

What is the proposed solution to avoid tight coupling in the Deck class?

• Remove the Editor view class.

• Add more functions to the Deck class.

• Create a base class to generalize behavior.

• Use a different programming language.

What function is introduced to manage multiple views in the Deck class?

• render

• setView

• initialize

• attach

How does the Observer design pattern benefit the system?

• It increases the complexity of the system.

• It requires more memory.

• It makes the system slower.

• It promotes loose coupling between components.

What happens when data is modified in the Deck class under the Observer pattern?

• The Deck class does nothing.

• The Deck class sends a notification to the views.

• The Deck class updates the views directly.

• The views automatically refresh without any notification.

What is the role of the 'notify' function in the Observer pattern?

• To directly update the data in the views.

• To send notifications to the views about data changes.

• To delete views from the list.

• To initialize the Deck class.