I had a phone interview followed by in person interview. After the 1st interview (which went well) they told me they have decided not to pursue with me further. I was a bit disappointed but since I am employed it did not matter too much. 3 weeks later they called me back for a second interview with the higher management. It was a long interview as well. I followed up multiple times about the outcome of my interview but they never responded back. It is completely ok to not hire someone but please have the courtesy to inform them or get back to them if they are mailing you.

Straightforward. Phone interview with HR, behavioural questions. In person interview with two members of the team, behavioural questions and case study about a process that is changing. Then in person interview with senior manager, questions were behavioural but more difficult, such as what do you wish you had done different in your old job, a time you achieved a goal.