I was co-paneling an interview with my manager a while back. After the usual rounds of chitchat we decided to give the candidate a coding test. The problem was not challenging really and there candidate seemed quite confident to show off his coding skills.

This, however, was quickly interrupted by my manager who insisted to describe the actual algorithm for the answer verbally. The act of being helpful confused the hell out of the candidate who increasingly grew nervous.

Eventually my manager decided that there candidate was a failure on the grounds that he being too slow to formulate a solution.

When pressed that there candidate could have completed the test swiftly if he had been left alone, I was told that the company was looking for "drones who can carry out instructions" instead of "creative rebels like you (me)"