In my interview they just asked "if we were sitting in the crew room now, what aviation related subjects would we be talking about?".
So I just gave a few examples of current events and that was that, about 3% of the interview.
The rest of it was spent giving examples of where I'd done this and that and the other.
Me too. I spoke for about 2 seconds on Pilot Fatigue and was told to move on, then got about 2 seconds in about the environmental impact of air travel and was told to move on then I spoke about the Open Skies Agreement between Europe and the Yanks.
I assume they kept moving me on to make sure I had researched something more than just 1 topic.