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Home/Questions/General/Other/Describe a time when you had to deal with a major data quality issue. How did you handle it?

Describe a time when you had to deal with a major data quality issue. How did you handle it?

General/Othermedium0.2 min readPremium
Frequency
Low
Asked at 1 company
Category
243
questions in General/Other
Difficulty Split
151E|43M|49H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Goldman Sachs
Key Concepts Tested
join
Expert AnswerPremium
42 wordsInterview-ready
**STAR**: **Situation**: Revenue metrics doubled overnight. **Task**: Fix and restore trust. **Action**: Traced to duplicate join in pipeline. Deployed fix; ran backfill. Added unique constraint tests. Communicated to stakeholders with timeline. **Result**: Metrics restored; no recurrence....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Goldman Sachs. The answer also includes follow-up discussion points that interviewers commonly explore.

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