Yes, I have to agree with historyftw as well.
There is competition for these placements, and it is generally unhelpful to the assessors if the details employed in the process are disseminated on internet bulletin boards. Obviously it is accepted that over a period of time the specific assessment details will need to be modified to maintain the effectiveness of what they are trying to achieve, however it is quite normal for people attending an assessment to be asked not to pass on the specific details to others who may be attending (or hoping to attend) later.
Teamwork is an intrinsic part of the job, and is assessed as part of these programmes by virtue of what is contained in the programme. It should also be remembered that confidentiality is also a part of the job and despite the realities of these things, is something that the assesors would hope the attendees would maintain.
It is human nature that candidates would want to arm themselves with as much advance information and possible advantage as possible, and everybody accepts that. However those charged with making the assessments want (as much as possible) to see the real individual before them rather than a cribbed interpretation of a former applicant.
So nothing wrong with the question being asked, but also nothing wrong with the answer that was given either. Passing on the specific details has nothing whatsoever to do with teamwork, nor is it what the assessors would hope to see (even though that is likely to happen over time,) and in a competitive process it hands a potential advantage to those with whom you are competing.
Candidates for these positions are not "colleagues" or "team mates" save as to specific situations where that type of co-operation is being assessed through role play scenarios or interview.