You know, NPCs dont actually KNOW anything, because they ar enot people., you see. So an assasin, an NPC, "questioning" another to know your location is too implausible to even comprehend.
Well, no, but they could need to follow your trail. If it was possible for the game to remember what questions you'd asked NPCs, and the assassin 'questioned' this NPC, he might be able to 'figure out' where you are going by the questions you asked.
Obviously, this would be an algorithm going on in the background from the moment he was set on your tail.