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It is not compulsory that a class should have methods and variables. It will be empty also. - The parameters that except the values in a method should be equal to the parameters that we pass in a ...

Whatever we do in Java, we do it in a class. A class is a user-defined blueprint or prototype from which objects are created. - In a class, we have methods and variables. - Class will be created in ...

Any one or more of these errors may exist in a program, and each will cause the program to crash or not run at all.