I applied online. The process took 1+ week. I interviewed at ConocoPhillips (Houston, TX) in Aug 2012
Interview
Very easy. Nothing difficult or unusual. I went in to interview for a one job and then they called me back in to interview for another. The second interview was really just to meet the team I would be working on and was more me interviewing them.
I applied through university. The process took 2 weeks. I interviewed at ConocoPhillips (College Station, TX) in Jan 2016
Interview
They ask you to answer all questions in a specific format. STAR format is what they called it. Challenging questions were made more difficult by the format they required you to answer in. On the spot