Answer / Ashk Kumar Shah

"Object-Oriented Programming (OOP) concepts in Java include: Encapsulation, Inheritance, Polymorphism, and Abstraction. Encapsulation is hiding the internal details of an object from outside users. Inheritance allows a class to derive properties (methods and fields) from another class, creating a hierarchical class structure. Polymorphism enables objects to take on multiple forms, allowing a parent class reference to be used with its subclass objects. Abstraction represents the general concept of an object, hiding unnecessary details and exposing only essential characteristics."

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