Amazon QA Engineer interview questions

The position was advertised as a software quality assurance position. It turns out that the Amazon developers test their own code and the QA people are responsible for test automation and tool building. This is how Google and Facebook operate also. The industry has found that if you hire more testers, then the quality of the code decreases because the developers do not test at all. Holding developers accountable for the quality of their code instead of testers is the key. Writing tests needs to happen before coding starts - ideally automated unit tests such as test-driven development.