Sales Internship applicants have rated the interview process at Mars 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 61.4% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
2 rounds of behaviorals, one was pretty casual, and the second was with two people instead of one. Behavioral questions, "tell me a time you did XYZ". Overall the people were super nice and provided support before the interviews too