Amazon Software Development Engineer interview questions

Contacted by recruiter for Buenos Aires hiring event. Passed online assessment without a good work, being honest. In the phone interview, great interviewers and I think I did well but was rejected after that. The next step was going to Buenos Aires for the loop. I asked for feedback without response (contact with the recruiter was 100% automated, so no surprise for me).

OA1: Find mistakes in sample code snippets, OA2: Three programming problems, 60 min allowed, OA3: Work simulation, and a simple intelligent test VO: Three behavior questions with several follow-ups, and a programming problem with its complexity analysis.