Align Technology Software Engineer interview questions

Received a call from consultancy and the process was very smooth. There are total of 4 rounds. Round 1: Regarding my current project and how did we implemented certain features and how did we handled fail case scenarios of any feature. Round2: call from Us and this was the general discussion about my project and the interviewer was friendly and was very much interested what you have learnt in your career. Round3: I was given an assignment (Online course management- through which student can enroll to available courses and courses might also has sub courses etc and admin access to create any course ) to complete in one or two days which I implemented Round 4:- Interview with director which I felt was tough one.. Many questions my projects and and my area of interest in near feature(I am interested in designing large scale distributed systems and Micro services) and couple of questions on time complexity of given problems Finally got selected.