Amazon Software Engineer Front End interview questions

First part was general questions about my past work, the projects I’ve done, and my overall experience. The second part was a 30-minute technical assessment done through a link they provided.

Round 1-Coding test online Round 2- Technical interview Round 3- Behavioural and HR It was an on campus opportunity and i made it up to round 2 . In Round 1 there were 2 coding questions related to the role i applied. In Round 2 the interviewer asked about myself,projects and some Data structures and algorithms questions related to Trees+Dynamic Programming problem .I gave the optimal solution and clearly stated my approach to solve but couldn't code completely as it required logics of backtracking and DP .It was an hour long.