Will a class object remain unchanged after inheriting from another class?

A class object that inherits from another class does not necessarily remain unchanged. Inheritance allows a subclass to extend or modify the behavior of the superclass.

If a subclass overrides the methods of the superclass, the behavior of the object can change. Additionally, the subclass can add new fields and methods, which extends the functionality of the object.

Thus, inheritance is a mechanism for creating mutable and extendable objects, not a guarantee of immutability.