They ask questions using the STAR Interview method where candidates are asked to identify the Situation, Task, Action, and Result. They typically ask about 3 questions like this and then other more generic questions.

Very long process, with difficult questions. Multiple meetings with various levels of people. Targeted selection questions are hard to answer. Need to prepare for weeks in advance in order to succeed. Need to have many detailed examples. Interviews are multiple hours in one day for one round. Phone screen first, then online assessment, than in-person if you make it that far. Process lasts for a couple months. Recruiter is good about contacting you. Overall a good experience but without enough planning you will not be prepared and could be caught with nothing to say. Management pretty nice during process, allowing you to refer to notes, take your time and come back to questions. Recruiter contacted me with job offer and received an official job offer letter as well. Be sure to send your thank you emails to all your interviewers too, this will help.