Answer 1

Am not sure what you meant by that question but from what I know is that in java there are 3 types of inheritance. Single inheritance where a class simply extends another class, multiple inheritance which isn't supported by classes in java, however you can implement as many interfaces as you want which to me is a form of inheritance. The third one is where more than one class extends from a common class, it's referred to as hierarchical inheritance. Hope I answered your question