Design patterns are general reusable solutions to a common problems that occurred in Software designing. There are broadly 3 categories of design patterns i.e. Creational, Behavioral and Structural. Now, Factory Design Pattern falls under the category of creational design pattern. It deals with the problem of creating objects (products) without specifying the exact class of object that will be created. The essence of this pattern is to "Define an interface for creating an object, but let the classes that implement the interface decide which class to instantiate. The Factory method lets a class defer instantiation to sub classes."


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