UrbanCode Java Developer interview questions

I gave them my resume in a career fair the same day I got a call they set up an interview for the next day and it was on. the interview wasn't really hard, but I wasn't ready, the interviewer was very nice and friendly I don't think he could have been a better interviewer he helped me with the question he asked but that wasn't enough for an offer the interviewer asked me about myself, what I do, you know the normal boring stuff then he asked me about an algorithm problem which wasn't hard at all but again I wasn't ready, and I wasn't focused.