Screening: A preliminary interview to determine if you're a viable candidate.
First interview: The first face-to-face meeting with the potential employer.
Second interview: A follow-up meeting if you've impressed them in the first interview.
Third interview: Additional rounds of interviews may occur.
You work on an Excel problem, and you answer questions about your work experience. It wasn't very hard, but the interviewers were not professional. There were a series of 3 interviews in the process.