EDA Engineer applicants have rated the interview process at Arm 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 65.9% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
Multiple video calls discussing technical questions on floor planning, PDN, and era scripts. Also had boolean logic, resume experience and other generic interview. Just practice more theory than implementation and you should be fine.