Had one round of interview on the phone. Questions were average to very difficult. Some questions revolved around creating an ER diagram for a library management system. There also questions on ETL design and architecture and basic SQL queries. Had answered all questions and even gave multiple approaches for many questions. But still didn't qualify for the next round of interview. AM not sure what they are looking for. Even the interviewer was very much interested and wanted to talk more but because the conference room was booked by someone else he had to leave and said they will call back. But there was no reply for two weeks and only after I followed up they emailed me the "you are not selected" template. Not sure what they are looking for. There are so many Amazon open opportunities flashing on every job websites, but all my past experiences with them has been so bad that I hesitate to apply.