D2L interview question

My interviewer focused on five or six key subjects (i.e. coding, performance, security, databases, data structures, etc.) and kept asking questions within each topic with incrementally more difficulty to see how deep my knowledge went in each area. I don't think this is the standard process, but it certainly left me thinking I didn't get the job until I got a call back. lol Overall, I thought it was a pretty effective process but I only conducted the occasional interview for D2L so I'm not %100 on what the "official" process is now (or if it is even standardised!)