They asked common behavioral questions for first round and assigned you with a problem to solve for second round. Second round was with both director and hiring manager. There was no technical question since I did not have any experience before.
Summer Intern applicants have rated the interview process at Wacker with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 68.1% positive. This is according to Glassdoor user ratings.
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