Amazon Software Development Engineer I interview questions

In general all the questions in the amazon interviews were problem solving or design based. Most of the time, after the approach was discussed, it had to be implemented in a language of your choice. First Round: The first round consisted of two 45-60 min phone interviews. Second Round: The second round consisted of four 1 hour one-on-one interviews and an 1 hour lunch with potential manager. Overall experience: Interviewers were friendly and interested in discussing and understanding my solutions and overall feel was great.

The recruiter from amazon contacted me and then arranged an interview on the phone. The interviewer was a manager looking to hire in this team. Interview lasted for 1 hour and was mostly about data structures and algorithms. Following questions were asked (1) An array of integer in which all numbers occur even times except for one number occurs odd times, find it. (2) Given 2 strings write a function which returns boolean whether all characters in first string occur in second string.