Optical Engineering applicants have rated the interview process at KLA 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 56% positive. This is according to Glassdoor user ratings.
Here are the most commonly searched roles for interview reports -
30 minute phone interview. Interview process involved mainly asking about prior experience from resume, mostly asking about research experience. Only needed to do one round of phone interview for the intern position.