Electronic Arts Software Developer interview questions

three phone interviews-- I had general behavioral one through coffee chat and then three following ones for coding. The questions were all algorithm-based and fair. The recruiter was nice, although it was harder for me to understand the actual coding questions with the actual tech interviewer interviewed me. However, once she put down the question so I could actually see and read it, it was straightforward enough.

It was a 45 min or 1 hour on campus interview. I come in and they ask me the usual EA questions: what were your past projects, what video games do/did you play, what do you know about EA? Then they ask me the interview question, which is to 'print out all the nodes at each level of a tree'. So then I explain what I'm doing and do it. The interviewer is annoyed that I'm explaining stuff to her instead of actually coding. She doesn't say anything the entire time except yes/no. Then after I code it, my solution works, except I didn't erase one unneeded line. She spends 5-10 minutes lecturing me about that line. Are you kidding me?