Definition :
Auditions are also a type of interview “question” that is behaviour-based and allows you to assess the candidate’s performance as if they were at work. Auditions are not tests.
The audition is a systematic process in which industry professionals select performers, which is in some ways analogous to a job interview in the regular job market. For some positions, interviewers want to see job candidates in action before they make a hiring decision. Subsequently, interviewers might take you through a simulation or exercise in order to evaluate your skills.
Further Reading
BOOK: Hiring Geeks That Fit by Johanna Rothman