I've had some good luck with open-ended questions like "Tell me about a time when you had to deal with a scaling issue." How they define "scaling issue" often

I've had some good luck with open-ended questions like "Tell me about a time when you had to deal with a scaling issue." How they define "scaling issue" often says just as much as their explanation as to how they solved it. I think I've had to ask for clarification a few times due to the interviewee answering the open-ended question with something I wasn't familiar with, but that's an excellent opportunity to gauge their explanatory skills anyway!