May 2024

An abstract class is a class that contains at least one abstract method, which is a method without a body (implementation). An abstract class cannot be instantiated on its own, but it can be inherited by other classes. When a class extends an abstract class, it must provide an implementation for all the abstract methods that are defined in the abstract class, otherwise, it should also be declared as an abstract class. There are a few other important points to consider when working with abstract classes:

An interface in object-oriented programming is a way to define a set of methods that a class should implement. It is like a blueprint that specifies what a class should be able to do, but does not provide any implementation details for those methods.

When you define an interface, you only provide method signatures or declarations, which specify the name of the method, the parameters it takes, and the return type. However, you do not provide any code for the method bodies. This means that an interface only contains empty method bodies, or “placeholders” for the actual code that will be provided by a class that implements the interface.