Senior Business Intelligence Engineer @Amazon AWS

Hi Amazonians, Can any one of you share some insight on how the AWS Hardware Team is ? I am done with the initial phone screen with the hiring manager and I have a tech round coming up? What do you guys advice I prepare, the HM told me that the tech screen will have sql, viz and etl questions. Any help/suggestion/advice from you will go a long way in my preparations. Thank you in advance. @Amazon