The most professional and comfortable interviewing experience I've ever had.

I gave my resume to a LinkedIn engineer at my university career fair, and also applied online. A few weeks later, a recruiter called me and discussed what I was looking for in an internship.

He then set up my first round technical interview: a single 1-hour phone interview, coding on collabedit.

A few days after the first interview, my recruiter scheduled my second round technical interview: two 1-hour phone interviews, same format.

The recruiter was very friendly and helpful in giving me advice and insight into the interviews.

All three engineers I talked to were patient with me as I worked through the coding problems.

If I had to say anything negative about the experience, it would be the length (6 weeks between last interview and offer letter).

However, the recruiter was quick to respond to my emails and was willing to take the time to explain exactly what was going on in the process.

Be sure to think out loud, and don't be afraid to ask for hints if you are stuck. Be comfortable coding without an IDE. They'll most likely have you talk out a solution outline before you start writing any code.

(hint: always consider recursion)