There are two interviewers. One interviewer will go through all the selection requirements first (i.e. don't remember exactly what the content is, but just give you a brief concept about how the application process looks like), and will start on giving interview questions. The other interviewer just gives a brief self-introduction and won't talk to you. She/he will take notes when listening to your answers. Each question has a time limit. At the end of interview, they will ask you if you have any further questions.