They originally came to my campus and emailed me several weeks later. They set up an initial HR phone screen, which consisted of a dozen mostly easy questions. The recruiter conducting the phone screen couldn't really answer my questions when I asked for clarification on the screening questions because the recruiter wasn't that technical. I thought some were trick questions, they were so easy. You can find almost every question from this interview on Glassdoor.

Then I had another interview, which was technical and over Skype with a young engineer. He asked me about my projects and resume, then got into some coding questions. I passed this interview and went on to another that followed the same format. If I could suggest one thing: practice recursion. I started solving all their problems iteratively and quickly realized that they were easily solved with recursion.

After a solid second technical interview, I received their generic rejection email. It was pretty sudden; I had gotten pretty far in the process (apparently, a back-to-back interview was the only thing left). Several friends of mine were also in the same boat – a sudden rejection late in the process. So, clearly, they have a tough time making decisions. It seems like they waste a lot of time and resources on all these interviews when they only hire about 30 interns.

Memorable coding question: Generate all permutations of an alphanumeric string (lowercase/uppercase only if a letter).

What's your favorite programming language?

HR screening: What's the kill signal in Linux?