Amazon Software Engineer interview questions

I applied online the process took several months. There were to rounds of phone interviews followed by an on-site, full-day interview. The interviewers on the phone were both chilled out and helpful. They asked some basic computer science related questions that I cannot recall but it wasn't hard. Both phone interviews had one coding task as it's main part which I had to conduct on the fly through a website that provided real-time visibility of my code to the interviewers. The first one they assessed if I'm capable of applying the OO design principles and made me implement a card shuffler. On the second phone interview I had to implement a function which returns the string versions of numbers in English, e.g. 11 => eleven.

I applied for job at Amazon in Netherland in The Hague. After one month I received an email of confirmation that I was selected for the first stage of the interview. First stage was a online coding test, solving two algorithms in the language of your choice with time limits of 70 minutes for both tasks. Tasks aren't so hard, even if you don't have practice of solving algorithms you still have enough time to solve it. I also tried to solve algorithms with better efficiency. As I remember one task was to reverse each word in a sentence with the possibility of very large input string. After I submitted solved algorithms, one week later I was contacted by their recruiter to arrange two technical phone interview. Both interviews were on the same day by the two hour gap. On first technical interview, first step was to connect to given url. On URL was shared text editor. My task was to setup conceptual class structure (OOP), for describing on form data and their types with the possibility of validating those data. And after that there was some question about my current role. And last five minutes I have a chance to ask them a couple of questions. Second interview was a little harder because the questions were about scalability of database and JVM level. Specially about database scalability when I need to describe architecture and how to organize and connect databases. It was quite hard explaining it without a whiteboard. And at the end there were couple minutes left for me to ask some questions. One week later I'll get a response from their recruiter that I didn’t passed to the next stage.