Question: Inheritance how to build has a relationship between classes; how to build is a relationship between classes; what is runtime method polymorphism; what is the

Inheritance how to build "has a" relationship between classes; how to build "is a" relationship between classes; what is runtime method polymorphism; what is the polymorphism of reference variables; how to use abstract classes; when and how to use interfaces. Exceptions what is exception and exception handler; what are checked and unchecked exceptions in Java; how to handle checked exception; how to handle multiple exceptions using several or one catch block; how to make a exception

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