Welcome to your interview.
The question is on your right: R, SQL, and Hadoop Concepts. 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 your understanding of R, SQL, and Hadoop and how you use them together to analyze data.