Score It Before It Clears
A hard Pipeline Design mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.
- Domain
- Pipeline Design
- Difficulty
- hard
- Seniority
- L5
Interview Prompt
A global card-payments platform needs to score every transaction for fraud before it clears, at roughly 10,000 transactions per second. Keep scoring decoupled from the payment gateway so a slow or unavailable scorer never blocks a payment: when no score returns in time, the platform approves the transaction and sends it for asynchronous review instead of declining it. Weeks later, chargebacks confirm which transactions were actually fraud, and those labels have to feed back into model retraining. Design the pipeline.
Summary
The fraudsters move fast. Your pipeline has to move faster.
How This Interview Works
- Read the vague prompt (just like a real interview)
- Ask clarifying questions to the AI interviewer
- Write your pipeline design solution with real code execution
- Get instant feedback and a hire/no-hire decision