Welcome to your interview.
The question is on your right: Two-Weighing Counterfeit Coin. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
You have 8 identical-looking coins, but one is counterfeit and weighs slightly less than the others. How can you find the counterfeit coin using a balance scale only twice?