The Silent Pipeline

A medium ai_coding interview practice problem on DataDriven. Write and execute real ai_coding code with instant grading.

Domain

ai_coding

Difficulty

medium

Seniority

L5

Problem

Last week the upstream booking_events feed broke for 3 days, so fct_bookings emerged empty each morning. Our data-quality suite reported all expectations passing. The on-call only caught it when finance asked why the dashboard was flat. Run tests/test_quality_suite.py to reproduce. Fix the suite (in dq/expectations.py) so an empty input table fails LOUDLY instead of vacuously passing every row-level check.

Summary

Silence, mistaken for success.

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