Amazon SDE Intern interview questions

I managed to get to the OA step of the interview. At the moment I did not know how to solve the problems because I hadn't researched anything on DS& Algos, just applied passively. So I got a week between being told that I had an OA interview and 5 days to finish the OA. The OA is typically 70 minutes.

The interview consisted of 3 Rounds ♦Round 1 - Online assessment *Coding + Debugging + Aptitude: (2 hours) There were four sections A. 7 questions for debugging (C / java) (25-30 minutes) B. 2 Coding Questions (DSA based) (1 hour) C. Work Style Assessment (To know how you work) (20 minutes) D. 24 Question Aptitude (Reasoning) (25 minutes) ♦ Round 2 - Technical Interview 1 Purely DSA based interview (1 - 1.15 hours) Asked 2 DSA questions with code and complete a dry run over their test cases. ♦Round 3 - Technical Interview 2 DSA + CS fundamentals + Project discussion (1 -1.15 hours) Purely DSA based + some CS fundamentals were asked. Asked 2 DSA question