Learning Dart (Video 9)

This video tutorial covers the creation of classes in Dart, focusing on abstract classes and inheritance. It explains the concept of inheritance in object-oriented programming, highlighting single inheritance in Dart. The tutorial demonstrates creating a base abstract class and extending it with subclasses like 'bear' and 'ghost'. It also discusses the use of the 'extends' statement and the limitations of single inheritance in Dart. The video concludes with a summary of the learned concepts and a preview of the next topic, which is implementing a library for better code organization.

What type of inheritance does Dart support?

• No inheritance

• Hybrid inheritance

• Single inheritance

• Multiple inheritance

What is a key characteristic of an abstract class in Dart?

• It can have abstract methods without implementation

• It must implement all its methods

• It can be instantiated directly

• It cannot be extended by other classes

Why can't you create an instance of an abstract class?

• Because it is a final class

• Because it is not a complete implementation

• Because it is a static class

• Because it is a private class

In the practical example, which class is used to demonstrate inheritance?

• Person

• Encounter

• Vehicle

• Animal

What method is called in the 'stumble upon' method of the environment class?

• initiateEncounter

• startEncounter

• endEncounter

• whenEncounter