I can confirm that such a "job interview" is not common in medicine. The potential employer generally relies on the credentialing process of the medical establishment. Most physicians, upon completing their training, pass a test demonstrating their ability to regurgitate the teachers' passwords, and are recommended to the appropriate certification board as "qualified" by their program director; to do otherwise would reflect badly on the program. Also, program directors are loath to remove a resident/fellow during advanced training because some warm body must show up to do the work, or the professor himself/herself might have to fill in. It is difficult to find replacements for upper level residents; the only common reason such would be available is dismissal/transfer from another program. Consequently, the USA turns out physicians of widely varied skill levels, even though their credentials are similar. In surgical specialities, it is not unusual for a particularly bright individual with all the passwords but very poor technical skills to become a surgical professor.