Grad Student Researcher applicants have rated the interview process at Caltech (California) 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 75% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
I applied online. I interviewed at Caltech (California) in Jan 2018
Interview
None for chemistry. This varies by department but chemistry programs across the country do not typically require an interview. Only the Application is reviewed and a yes/no decision is made.