Java Oops Interview Questions

1. Implementing two interfaces in a class with same method. Which interface method is overridden? 

interface A{ int f(); } interface B{ int f(); } class Test implements A, B{ public static void main(String... args) throws Exception{ } @Override public int f() { // from which interface A or B return 0; } }

• If a type implements two interfaces, and each interface define a method that has identical signature, then in effect there is only one method, and they are not distinguishable. 
• If, say, the two methods have conflicting return types, then it will be a compilation error. This is the general rule of inheritance 
• This is the general rule of inheritance, method overriding, hiding, and declarations, and applies also to possible conflicts not only between 2 inherited interface methods, but also an interface and a super class method, or even just conflicts due to type erasure of generics.
• Reference
https://stackoverflow.com/questions/2801878/implementing-two-interfaces-in-a-class-with-same-method-which-interface-method