Tutor.com Software Engineer interview questions

1-salary, tell me about your self, bala bla bla 2- tell me about your projects, bla bla bla 3- Binary Search algorithm * what is the difference between interface and abstract class (OOP) * FizzBuzz algorithm * how to connect mobile app to DB? what if we loose connection and we want to perform an operation? * SQL question : write - inner join left join right join and full outer join ? *