Personally, I think studying SSAT is not necessary. It's kind of IQ test. And it contained questions about some situations, such as "What would you do if your patient's vital sign is not stable but night doctor didn't answer your call."
After taking SSAT, I had to 2 types of interview(1st interview was good, atmosphere or questions. Most interviewers were senior nurses.
esp.2nd interview was tough. They seemed they objectified me. The interviewers were executive team, doctors)
And then I have to have medical examination.
