Java Programming for Complete Beginners - Java 16 - Step 16 - Java Interface - Example 1 - Gaming Console - How to Think

The video tutorial introduces the concept of interfaces in Java programming, explaining their importance and how they differ from abstract classes. It demonstrates creating a simple gaming console interface and implementing it in different games like Mario and Chess. The tutorial highlights the advantage of interfaces in achieving polymorphism, allowing multiple implementations without changing the code structure. The video concludes with a summary of the discussed concepts and hints at further exploration of interfaces.

What is the primary conceptual difference between an abstract class and an interface in Java?

• Interfaces define a contract without implementation.

• Abstract classes cannot have abstract methods.

• Interfaces can have constructors.

• Abstract classes can implement multiple interfaces.

What keyword is used to define an interface in Java?

• interface

• class

• extends

• implements

In the gaming console interface, which of the following is NOT a method defined?

• Up

• Jump

• Down

• Left

What action does the 'Up' button perform in the Mario game implementation?

• Do nothing

• Go into a hole

• Jump

• Move forward

Which keyword is used to implement an interface in a class?

• extends

• implements

• uses

• inherits

What is the term used to describe the ability to have multiple implementations of the same interface?

• Inheritance

• Encapsulation

• Polymorphism

• Abstraction

How does the game runner switch between different game implementations?

• By creating a new instance of the desired game

• By modifying the interface

• By using a different class name

• By changing the interface methods