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

The video tutorial addresses an issue in a slide deck application using the observer pattern, where unnecessary slides are displayed upon updates. The instructor proposes a design tweak to ensure only modified slides are updated, using a combination of push and pull models. The solution involves sending the index of the changed slide to the views, optimizing the notification mechanism. The video concludes with a demonstration of the improved output and hints at further optimization in future lectures.

What is the significance of using the index of the slide that has changed?

Describe the changes made to the view classes to handle slide updates.

In what scenario will all slides be displayed on the screen according to the teacher's explanation?