You'll have to go through a series of interviews, but first you have to pass the online assessment. Once you qualify for a position they will contact you for the initial interview with the HR. Then at least 2 more interviews with people from the department where you're considered. The interview is very formal and usually competence based questions are asked and some business case scenarios are given.

The interview was quick. Three questions were asked about my previous experiences. Another set of questions which are situational test how you would take action if given the position/ react.