I applied online. The process took 2 days. I interviewed at Intel Corporation (Santa Clara, CA) in Feb 2014
Interview
Just kind of called out of the blue. They didnt really interview me on much just asked basic c questions. Kind of easy to tell you the truth. If you have taken any sort of class in c your golden.
I applied through an employee referral. The process took 2 weeks. I interviewed at Intel Corporation (Sacramento, CA) in Jul 2010
Interview
Interview was initiated by a fellow student of a local university. Two rounds of code competency tests were submitted via email. I don't remember exactly what the exercises were but I seem to recall them to sufficiently difficult. The interview then progressed to an all-day, on site interview gauntlet consisting of several hour or so interviews with several employees.