Software Engineer applicants have rated the interview process at Amazon with 3.3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 67% positive. To compare, the company-average is 61.5% positive. This is according to Glassdoor user ratings.
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The process took 3 weeks. I interviewed at Amazon in May 2012
Interview
Classic questions about algorithms and data structures. They asked me about my background and things I had done in the past related to the job. They were really diligent and helpful throughout the process, and bought me the plane ticket and the room in Seattle for the final interview. Get prepared, as your knowledge will be challenged in many ways.
The process took 4 weeks. I interviewed at Amazon (Seattle, WA) in Jan 2012
Interview
I had 3 telephone interviews before I got a reject. All 3 were technical as expected. Interviews covered almost all parts of software development-- OOD, Design Patterns questions, OS conxcepts, DB concepts.
Be confident and do not bluff( its like digging your own grave). Be thourough with OOD. Scripting language knowledge very helpful. Also if you have worked in Linux then it is helpful.