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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 read

Reviewed by Aditya Kumar · Last reviewed 2026-03-24

**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...

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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
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Key Concepts Tested
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Expert Answer
42 words

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. Emphasize: Root cause; fix; prevention; communication.

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Pro Tip

Pro-Move: 'We found the bug in 2hr, fixed and backfilled in 4hr, added 3 dbt tests—and sent a post-mortem to 50 stakeholders.' Red Flag: Fixing without communication—stakeholders need to know.

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