There're only 2 interview processes for me while the others had 3 or less.
So, the first one is just interview with Manager and HR. Before I met them, I had to take the IQ test first.
After I passed the first interview, I was arranged to meet for the salary negotiation.
The first interview might not be very good pleasant experience for the first timer because the manager did the stress test which might be kinda an insult to interviewee. But even with the stress test, overall it's a good experience.