Hi, team based interview's aren't the norm for Crewing roles in my experience. I only know of one low cost operator that uses team based assessments during their recruitment for Crewing personnel - but that's not to say others will not follow.
My last Crewing role was for a Charter company and it was a two on one interview. Its a very customer focuses (the crew being the customer) so examples of when you have provided excellent customer service, how you would handle somebody being unpleasant with you on the telephone, things like that. Prioritizing your workload is very important and is having a good eye for detail as you will have to run numerous reports that determine crew legality and making sure crew compliments are correct.
Your knowledge of FTL should help you. But if you are the right person then they will train you anyway. In the end you will need to know the FTL's but there will always be the guidebook not to far away!.
Always willing to help