Hi roar00
if you look back at previous posts i am sure you will find some examples, but as far as i know, and i have not done my S2 yet, you are expected to give examples of when you have shown leadership or quick thinking etc etc.
You may be given hypothetical questions but only from an HR point of view (what would you do if you went to work and thought your boss was drunk) nothing theoretical with regard to actual ATC situations, that is more S3.
i am sure ppl who have actually done S2 will perhaps give bttr insight tho, as i am only repeating what has bn said previously on here.
shugs