hi manmeet,

first of all , its not fst,its fsp which has german full form. its a series of assessment tests taken by the german authorities to let international students study their bachelor's in germany. see the both neet and fsp are based on physics ,chemistry and biology but the problem isn't how difficult the paper can be, the bigeest challenge is that all of it, everything from start to end is in german. you need to provide c1 certificate of your german language proficiency.also they teach medicine in german only. and that doesn't end there, the admission process itself is very different than that in india.so u need to be very well aquainted with that.

check this limk. it has question papers of the exam, but in german. https://support.kiron.ngo/373449-What-is-the-Feststellungspr%C3%BCfung