Amazon Software Development Engineer (SDE) I interview questions

1 coding assesment, 2 tech rounds consist of 2 ds and algo problems, 1 basic oops concept and design round, 1 bar raiser round that also contains some good ques of the ds and algorithms

3 back-to-back-to-back interviews. @ of them went well and the interviewers were nice, however the 3rd one, which I believe was with the "bar raiser" was poorly conducted. The connection was bad, didn't hear my questions, and didn't talk much to me.