I had a full day of back-to-back interviews, and a follow-up interview a couple of days later. Most of the interviews were technical, focusing on Data Structures, OO Design, and a sample app. There was also a product question, asking about things I could do to make the Uber app better.

The people interviewing grilled me pretty well, and I think I didn't do too strongly on OO Design, so they had me come back again and asked some more questions to make sure I knew my stuff.

Make sure to come prepared, and make sure to answer questions while confident and thinking clearly and out loud.

I won't go into the detail of the question, but the data structure questions are pretty difficult.

Make sure to think through the problem, study your basic data structures, run-time complexities, etc.