"Is the old table up in the attic or down in the basement?"
Translation:A régi asztal fent van a padláson vagy lent a pincében?
First of all, in this sentence you need the verb "van" (to be). If you use fel- or le- as a prefix, it means the direction of a movement or an action (give up - "felad", go down - "lemegy"). If you use the "fent/fenn" or "lent/lenn" as separate words, that will indicate the location of the action.