The interview only takes one round. I applied through their career website. The interveiewer will ask few quesitions about your project experience and few database design questions. They also ask you to wirte code based on logic such as how to reverse a string. the quesiton is easy. The main point they look at is your self-confidence. So don't worry if you don't know the language they required in the job description. If you can pick it up quickly, then there should be no problem.