Amazon Software Engineer interview questions

Applied online and got call for interview. There were six interviewer, interviewing me one at a time. They asked me some questions and how i will solve it. Then they asked me to write the code in the white board. Most of the questions were about data structures and algorithms. For every algorithm question they asked the complexity of the question

I had three phone interviews from different engineers. The first part of the interview consisted in questions about my past projects. These questions are quite open and aim to know not only the technical part, but also the work approach, the issues with other collaborators and partners. The second part of the interviews was technical, with algorithmic problems or design and implementation problems (C++ in my case). Finally, some more minutes were allocated for questions. For the feedback I had to wait just three days for the first and second interview, while for the third (negative) I had to wait 10 days. Interviewers are very nice and let you talk a lot. If you are in trouble with a problem they try to give you some hints. I actually almost panicked during the second interview because I was feeling that my design was not good enough. The interviewer wisely let me think through and I even passed that interview step. I was told that people don't follow any dress code and that the environment is very challenging. As an engineer you are responsible for the design and implementation and everything is up to you. This means that besides the people that talk with the clients, you (and your team) will be the only responsible for that product. Also, I was given only a vague answer to my question about the work organization (single/multi task, team size, number of meetings per week, etc) because the engineer said that they are part of the company strategy.