Computer scienceProgramming languagesJavaCode organizationObject-oriented programmingClass hierarchiesInterfaces and abstract classes

Abstract class vs interface

Statements

Report a typo

What are the differences between abstract classes and interfaces?

Select one or more options from the list

An abstract class can implement only a single interface while an interface can extend any number of interfaces.

An abstract class can be instantiated directly while an interface can not be.

An abstract class can have abstract and non-abstract instance methods while an interface can have only abstract and default instance methods.

In an abstract class, the keyword abstract is mandatory to declare a method as an abstract while in an interface this keyword is optional.

___

Create a free account to access the full topic