Spring Internship applicants have rated the interview process at Mars & Co with 2 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 52.4% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
It was a 30-min interview mainly consisted of behaviorals. There was a mini-case but was not too seriously given. A friendly conversation accurately describes my interview experience. But I think the process is different for a formal summer internship.