There are plenty of other threads on the matter, but to save you searching;
You get a technical questionnaire (same as in the Cathay book).
You get an interview split into 2 parts:
1 - Human Resources interview dealing with competency based questions (give an example of a time you dealt with a complex situation, etc)
2 - A technical interview with a pilot.
This all takes place in half a day. If you are successful, you will go for sim assessment the same afternoon, or next day.
That's it!