I was looking for some Evangelion merch on red bubble when I stumbled upon a cup on which was written the following japanese phrase:
With the english translation below it, being "What are you afraid of?" Which isn't exactly how my non-expert self would translate it. In fact, I would translate it very roughly like "Is anything scary?", because to me the structure of the phrase looks like 何 + subject marker が + adjective 怖い + doubt particle の and question transformer か. "What are you afraid of?" for me would be something like "怖いって何ですか" or something like that, but I might be missing some kind of rule/having some kind of misconception, since I'm a relative beginner.