Amazon Software Development Engineer interview questions

Interview process started with phone interview then after passing within two weeks I was set up for onsite full loop. Phone interview was to find the most repeated paths (most used). After the offer I was given L4 I asked for higher level and they decided to proceed with one extra interview after the on-site. Then I got an offer for L5z

3 Rounds 1 st Round: Debugging (7 questions) 2nd Round: 2 Coding questions( Search in a matrix, Copy random pointer) 3rd Round: Virtual interview ( Some basic Hr questions and one coding question to group by dates of a given list of strings)