It was really casual and I was interviewed by the big boss and the section editor. They asked me rather straightforward questions you might expect from an interview. Ultimately did not get the job due to timing issues, but the company was responsive and accommodative throughout the application process.

There are 2 segments: background, then personality tests. The background tests include the "serious" questions, where you'll be asked about your education background, the stuff you did in your spare time etc. The personality test makes you think out of the box, so you'll have to be agile. The only wrong answer for this is if you don't answer.