They asked me two coding questions and around eight to ten in-depth Android concepts, covering the internal workings of various components.

I could not understand one coding question clearly due to differences in speaking accents, but it was clearly a misunderstanding from the interviewer's side.

I kept asking for a specific pointer in the question, but they repeated the whole question each time, omitting that detail. However, they were calm and kind enough to explain the question to me multiple times, and we finally reached a point where I could understand that detail and solve the question successfully.

I also answered most of the other questions, but I got a bit stuck because I didn't know the internal workings of RelativeLayout and ConstraintLayout.

I was rejected due to two points: taking too much time on one coding question, and not being able to explain the internal workings related to that question.

1 chess board design question, 1 question which used heaps and sliding window. Concepts and internal workings of various Android components.