There were 3 rounds : 1). Telephonic discussion about the company and my goals. My experience with mobile development and a couple of questions about system design. about 40-45 mins long call. 2). An Android specific round, mainly focusing on how background tasks are scheduled on Android, encryption, data management etc. 3). DS Algo round. started from low level questions and went upto difficult ones. : Questions about Array -> Linked List -> Matrices