Welcome to your interview.
The question is on your right: Finite Differences for Differential Equations. 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.
Explain the concept of finite difference methods and describe how you would apply them to solve a differential equation.