Reach Mobile interview questions

I had an interview scheduled, although at an uneven time of 7:30 at night, the interviewer was good. The interview also went good. I learnt a lot from the interviewer and he made it a two way process. But post the interview even after so many follow ups, the HR hasn't responded at all. She ghosted me and it has been more than a month now.

1.Technical round : asked the questions on the components of the android ,architecture ,design principles 2.Coding round : they asked simple reverse string , count the ocurrence of the characters