Hierarchical Inheritance in C++ refers to the type of inheritance that has a hierarchical structure of classes . A single base class can have multiple derived classes, and other subclasses can further inherit these derived classes, forming a hierarchy of classes.
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In Java, the class Object is at the top of hierarchy. Every class in Java inherits from Object and is-an Object. One of the main reasons to use an inheritance hierarchy is that the instance variables and methods from a superclass are inherited and can be used in a subclass without rewriting or copying code .
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