Complete Java SE 8 Developer Bootcamp - Interfaces: Part 1

The video tutorial discusses the implementation of a draw method for different shape classes and explores the concept of polymorphism. It highlights the challenges of using inheritance with a Cat class and suggests using interfaces to address these issues. The tutorial explains the rules and structure of interfaces, including the introduction of default and static methods in Java 8.

What is the primary reason for moving the draw method into the shape class as an abstract method?

• To eliminate the need for a draw method

• To reduce the number of classes in the program

• To ensure all shapes have a draw method available

• To make the code more complex

Why can't the Cat class simply extend the Shape class?

• Because Cat is not a type of Shape

• Because Cat is not a public class

• Because Cat does not have a draw method

• Because Cat cannot be compiled

What is a key benefit of using interfaces in Java?

• They allow for multiple inheritance

• They enable polymorphic treatment of different objects

• They make classes private

• They eliminate the need for abstract methods

What must all methods in an interface be?

• Private

• Protected

• Public

• Package-private

What are the types of methods that can be included in an interface as of Java 8?

• Void, int, and string

• Final, static, and synchronized

• Private, protected, and public

• Abstract, default, and static

What is the default assumption for methods in an interface if no modifier is specified?

• They are private methods

• They are abstract methods

• They are final methods

• They are static methods

What is a common misconception about interfaces before Java 8?

• Interfaces can only contain abstract methods

• Interfaces can have constructors

• Interfaces can contain private methods

• Interfaces can be instantiated