TypeScript for Beginners - Introduction - Inheritance

The video tutorial explains the concept of inheritance in Java using the 'extends' keyword. It uses examples like iPhone models and vehicles to illustrate how inheritance allows objects to access and update existing functionalities. Key terms such as reusability and easy relationship are discussed, highlighting how common functionalities can be shared across different objects, like cars and buses, through a parent object, such as a vehicle.

What keyword is used in Java to implement inheritance?

• implements

• extends

• derives

• inherits

How does the iPhone 7 model benefit from inheritance?

• It can use features from iPhone 6S and improve them.

• It cannot use any features from iPhone 6S.

• It replaces all features of iPhone 6S.

• It can only use new features.

What is an example of reusability in inheritance?

• Creating a new class for each object.

• Using common features from a base class in derived classes.

• Avoiding the use of base classes.

• Redefining all features in each subclass.

Which of the following is an example of the 'is-a' relationship?

• A bus is a car.

• A BMW is a vehicle.

• A vehicle is a BMW.

• An Audi is a bus.

Why can't an Audi be considered a bus in terms of inheritance?

• Because they are different brands.

• Because they belong to different inheritance hierarchies.

• Because they are both vehicles.

• Because they have the same features.