Abstract classes can have abstract and regular methods. Abstract methods have a signature with no implementation body. Abstract methods can only be used in abstract classes and are used to specify ...

Abstract classes are similar to normal classes, with the difference that they can include abstract methods, which are methods without a body. Abstract classes cannot be instantiated.

No default implementation for these methods are needed in the base class and hence they are marked as abstract. So, method overriding is enforced by declaring the method as abstract in the base ...