OOPs mainly consist of 4 pillars i.e polymorphism,abstraction,encapsulation, and inheritance. Polymorphism is a way to display the task in differnt forms.for eg. we can do addition task bt using differnt methods. Abstraction is hiding of unneccesary information and showing only information which is neccesary information. Encapsulation is binding of differnt methods in one form. Inheritance means inheriting properties to child class.