I talked to a recruiter who arranged a skype video call interview with an engineer. He talked little bit about the group and position and shared a collabedit for a programming exercise. I was asked to code fibonacci series which i did using recursive programming. But he asked if there a better alternative since recursive call would calculate the same value calculated previously. So I did using non recursive pattern. But i had put an unnecessary condition which can be converted into else condition. But i got rejection email afterwards.