Microsoft Software Engineer - Internship interview questions

Talked with a recruiter at career fair and gave them my resume. They followed up a couple of weeks later with an on campus interview, which was fairly standard and 30 mins in length. Consisted of a technical question and some background/ interests questions.

Referred by a previous Microsoft intern. I was contacted soon after to schedule a phone interview. The interview was short (~30 minutes), and they asked mostly behavioral questions. There were no technical questions, but I was asked one 'puzzle' question that I failed to answer correctly.