Java Interview

Java Interview

1. Access Modifiers

   • you can’t create sub classes to that class which has only private constructors.
   • Inner classes can be private, but outer classes can not be private.
   • Outer class can not be protected
   • private inner Class can not be instantiated outside the Class
   • You can’t reduce the visibility of a method while overriding it.
   • A top level class may have only the following access modifier public and default

2. Override and Overload

   • Static methods can not be overridden. If we try to override them they will be hidden in the sub class
   • we can change the return type of overriding method to a sub class
   • we can override a super class method without throws clause as a method with throws clause in the sub class but only with unchecked exceptions

3. Inheritance

   • Super class field will be hidden in the sub class. You can access hidden super class field in sub class using super keyword.