from personal experience I would say that you should definitely know about different theorists (Piaget, Ericsson, etc.), general knowledge about different age groups and the differences between them, and have strong answers for questions on why you chose the field, advocacy, etc. Also, make sure and be honest with the scenario based questions — if you don’t know what you’d do in a situation, say so! And just tell them you hope to learn that during your practicum 🙂
They have some sample questions on the clc website you can review.
Let me know how it goes! Good luck!!