The two interviewers were pretty unfriendly, not much personality in this department it seems. Lot of behavioral questions that were confusing. I tried to make small talk with the interviewers but they seemed quite disinterested. There was three main behavioral questions which were pretty standard. (STAR Method). The last question, which was a riddle, threw me off. United likes to throw in confusing riddles in their interviews so beware. I understand that they are trying to gauge how interviewees think out problems & solutions, but trying to "trick" people with confusing prompts during an already stressful interview is childish.