The unstructured interview occurs when the interviewer doesn't have a list of answers to do to the interview, or at least it's not fully structured and it goes according to the person's answers and what the interviewer still needs to know.
In the behavioral description interview, the interviewer wants to actually know what the interviewed person has done in past situations.
In a situational interview, the candidate is asked what would he do in hypothetical escenarios.
Compatibility tests are used in early stages of interviewing to see if the candidate profile matches the job for which they are applying.
Performance tests put the candidate into a heavy load of pressure to see how he/she would react.
In this question, the actual question "What was the best idea you ever sold to a supervisor, teacher, peer, or subordinate?" is actually <u>asking for information about what the person has done in the past.</u> Therefore, this is an example of a question done in a behavioral description interview.
