Kellton Android App Developer interview questions

I attended the interview as an experienced android apps developer. applied online and get a call from them and scheduled my F2F interview. once I attend they said there is a panel in leave and we have another panel in Gurgaon you will get a call from them. as HR said I got a call from Gurgaon panel and asked mainly about core java questions on JDK, JIT, collections, strings and string methods, threads, oops concepts, android activity life cycle methods, fragments life cycle methods.