Java is an object-oriented programming language. You can create multiple classes in Java and create a class hierarchy such that one class can call another class. Do not confuse this with Java inheritance because, in class inheritance, there is a parent-child relationship between classes.
Read moreHow many classes are in a program?
The correct answer to the question “How many Classes can be defined in a Single Program” is, option (d). As many as you want . Inside a program, you can mention any number of classes, since there is no restriction, but the only thing that should be remembered is that all their names should be different.
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