Yes, the verb always goes before the subject in questions. The only thing that can go before the verb is a question word (like 'who, what, how') or a phrase that has the same function as a question word (like e.g. 'how many books'). In statements, the verb always goes in second place, but the subject may go after the verb too, so the order between subject and verb doesn't necessarily change.
I put "He is resting?" as my answer and got it wrong, it's possible there's a more accurate way to translate "He is resting?" but just going by what I know so far I would've thought "Vilar han?" is the only way and thus the inverse, that "He is resting?" must be an acceptable translation for "Vilar han?", should be true too, yes?
Edit: According to google translate it would be "Han vilar?" but surely this contradicts having verbs first in questions?