Define abstract classes
Define abstract classes and also describe its distinct characteristics?
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Abstract classes can be defined as the class which cannot be instantiated and are always used as the base class. The characteristics of an abstract class are as follows:
i. Abstract class is always public
ii. We cannot instantiate the abstract class directly. Which implies that we cannot create the object of an abstract class; it should be inherited.
iii. Abstract class is declared by using an abstract keyword.
iv. We can have abstract as well as non-abstract members in the abstract class.
v. We must state at least one abstract method in a abstract class. The central purpose of the abstract class is to offer a common definition of a base class which multiple derived classes could share.
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