Depends on your job scope. For engineers, they will ask questions based on your background. For managers, they will ask what kind of projects you have led before.
A lot of technical questions and also an English test.
The following metrics were computed from 1 interview experience for the TSMC Senior Engineer role in Taipei.
TSMC's interview process for their Senior Engineer roles in Taipei is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for TSMC's Senior Engineer interview process in Taipei.