Finance found a rounding bug introduced 30 days ago in daily_revenue
A medium 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
- medium
Interview Prompt
Finance found a rounding bug introduced 30 days ago in daily_revenue. Today's run is correct; the last 30 days are off. They need a backward backfill replacing each day's partition. The pipeline reads NOW(), INSERTs into plain Snowflake, and has no orchestrator. Apply the section's four backfill prerequisites so the orchestrator can drive a clean loop over dates.
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