Java Programming for Complete Beginners - Java 16 - Step 20 - Java Interface Flyable and Abstract Class Animal - an Exer

The video tutorial covers the concepts of interfaces and abstract classes in programming. It begins with an introduction to interfaces, using the example of a 'flyable' interface implemented by a bird and an aeroplane. The tutorial then provides an exercise to implement this interface, followed by a detailed solution. The second part of the video introduces abstract classes, with an exercise to create an abstract class 'animal' and its implementations by a dog and a cat. The video encourages viewers to pause and try the exercises before discussing solutions.

What is the primary purpose of an interface in programming?

• To manage memory allocation

• To store data in a structured format

• To define common actions that can be performed by different classes

• To provide a graphical user interface

Which of the following classes implements the 'flyable' interface?

• Car

• Bird

• Fish

• Tree

How does the 'bird' class implement the 'fly' method?

• With engines

• With wings

• With wheels

• With sails

What is the role of an abstract class in object-oriented programming?

• To handle user input

• To define a template for other classes to extend

• To store data in a database

• To provide a complete implementation of methods

Which method must be implemented by classes extending the 'animal' abstract class?

• swim

• jump

• bark

• run

What sound does the 'dog' class print when the 'bark' method is called?

• Meow

• Woof

• Bark

• Bobo

What concept will be discussed later in relation to interfaces and abstract classes?

• Polymorphism

• Encapsulation

• Abstraction

• Inheritance