Questions posées lors d’un entretien d’embauche pour Java Software Developer chez Addteq

It is a consulting company. They found me. The first time they scheduled a phone screen for me and by then they sent me an email saying that they were fixing the company's telephone system and couldn't call. And rescheduled for another time. This time they still didn't call. I emailed them to ask and was got back that we should schedule for a third time. Ok. The third time, they should call me at 3pm. I waited till 3:15 and the HR called me saying their technical engineer will call me at 3:30. Finally at 4:10 they called me. The interview was easy. They asked the definition of interface, abstract class, static, exception handling in Java, foreign keys and join in database.