Concentrix Senior Android Developer interview questions

Few days after applying to the job I got an email asking for my free time to setup an interview. Few days latter we did the first interveiw in skype. It took 30 minutes and it was really professional, I really felt comfotable with the interviewser. She asked me general question about the Android technologies things like unit testing and TDD and also SOLID principles. She also asked few question about my background and my past positions and responsibilities. After that they asked me to do a test work for them. The task was to develop a very simple Android app. After finishing up and sending it to them I got another email and they invited me for the second interview. The second interview took 1 hour and it was with a tech quy. He asked me a lot of technical question regarding android development. Some of the question were really hard and I didn't do very well, Still i liked the second interview as well. He also responded very well to my questions. I didn't get anywhere farther but I liked how they responded to me. It was professional, polite and frindly.