I was referred by a friend. I first talked to a recruiter who asked me about my background, how much I time I spent writing code, etc. I then had a technical phone interview in which the interviewer asked me why one should have virtual destructors. I eventually fumbled through it (but could have done better had I studied my Effective C++ book!). After that I had to write a program that drew a horizontal line in a 2D raster, given that the raster was a bit array.