Interview structures vary, but there are some common characteristics. The atmosphere is usually formal. The interviewers introduce themselves, and will then invite you to present yourself, your education, previous work experience, any special skills and competences, your interests and why you applied for the job.
Employers usually ask questions about your CV, previous work experience and their expectations. The interview lasts about 1/2 hour.
Save your own questions for the end of the interview, keep them brief and avoid going into too much detail.