3 rounds of interview, 1 of it was pure technical on service assurance product and related domain knowledge. Questions are quite challenging if you're not familiar with neyworks. The people are nice and accomodate your questions. They value knowledge.

I passed two levels of selection. All in english. They would like to see both your technical knowledge and your disposition. They asked about your past, your vision of the future and why I decided to change the company.