There was IQ, maths and personality tests on assessment day. Afterwords, there were 2 case studies one with presentation. Few weeks after assessment center, I was called and offered an face-to-face interview for maintenance engineering which is not related to the job I applied for.

one round interview process. One hour interview across the technical and all other soft skills questions. Technical part covered more about the previous work experiences and projects I did. Soft skill questions included the project management and the previously project example.