Industry

I just recently finished an on-site for an internship with a fairly well known company, but not Big N. I prepped a ton of leetcode which helped in the hackerrank and technical phone screen portions. But during the on-site I had just 1 whiteboard algorithm question, then a system design, and then debugging on a laptop. Despite doing well on the whiteboard algo question, the system design and debugging seriously threw me off and I’m not sure how I would prepare for these anyway. Do any of you notice companies are incorporating other styles of interviews or are slowly moving away from leetcode? Or was this one company doing something different. Also any good online or textbook resources for practicing system design and debugging (similar to CTCI and leetcode)?