So what they use ORM instead of raw SQL? Your role as interviewer is to figure out if they would be able to learn. I can almost see your ads: 5 years of OOP with design patterns, 5 years of MySQL database, 3 years of API, etc.
How about you try to figure out if they can learn? A few months ago, I interviewed a junior guy. We were looking at a simple code exercise he did before coming in. I asked "Why did you lose a List here?" "I don't know, I needed a collection" "Do you know how List is implemented?" "No". I spend a couple minute explaining about singly-linked Lists, and ask "Now that you know, would you use it again?" "No, cause it's terrible for append operations".
He didn't know, but I explained and he understood alone. Why don't you try to explain and see if they can come to conclusions?