AUTO1 Group Senior Android Engineer interview questions

I have applied through StackOverflow and got a invitation for Skype interview. The interviewer was very friendly and the interview took 20 mins and received another mail saying that I am moved to the next round of interview and it was a coding task to complete in a week time. I have completed the task and sent the code on the mentioned time. After 3 weeks, I have received the mail saying that I am not selected, also feedback was given for my code. 1. MVVM pattern is not followed correctly.