The interview was simple and easy. They asked basic math questions and basic chemistry questions. English is a big plus. There were more than 7,000 applicants and the openings were 250. The interview started at 7 a.m. and they closed the door at 7 a.m. there were a few people who came a few minutes late and the security officers did not allow them in. The interview is quick and easy. If they found out that you dont have a good mathematics or chemistry basic knowledge they will reject your application right away