Workday OMS Development Intern interview questions

I attended the job fair at UCSD, talked to the recruiter for a quick 5 minutes. A few days later I received a phone call asking if I would be able to come in the following week for an interview. I obliged. It was a quick 30 minute interview with one of the developers, I will go into detail regarding the questions below. At the end of my interview he asked me to do some basic testing of the different optimizations we did for calculating Fib numbers. I wrote a detailed report implementing Fib several different ways (recursive, iterative) with several different optimizations using several different data-structures. Lastly, I implemented it in OCAML just for some bonus code. After sending my email the interview responded saying to "Expect to hear from us soon" Roughly two weeks later I received a phone call with my offer. So in all, I only had 1, 30 minute interview and a follow-up email. I am fairly certain that this is not standard practice and most interns fly to the Workday campus for a full day of interviews.