Your question is Detect Fraudulent Transactions. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you figure out whether a transaction is fraudulent?
Describe a practical machine learning approach for detecting fraudulent transactions, including feature engineering, model selection, handling class imbalance, validation, threshold selection, and production monitoring. Explain how you would evaluate the system when false positives and false negatives have different business costs.
