OfferUp Data Engineer Interview Questions
The questions to prepare for a OfferUp Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Find the first non-repeating integer in an array using frequency counting and a second scan.
OfferUpMerge two sorted singly linked lists into one sorted list by relinking existing nodes.
OfferUpExplain how to derive time and space complexity for a coding solution and justify the final Big O bounds.
OfferUpExplain how to diagnose and optimize a slow PostgreSQL query on large Apidel Technologies datasets.
OfferUpTests foundational SQL knowledge for querying and shaping relational data.
OfferUpEvaluates understanding of how indexing choices affect query performance and storage tradeoffs.
OfferUpAggregate project outcomes and present a defensible SQL-based business case analysis.
TikTokUse SQL aggregation and Python validation to explain how a workplace data problem was solved and measured.
LalamoveUse ROW_NUMBER() to keep the earliest created_at 'Repl created' per entity and return out-of-order duplicates to delete.
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Tests ownership under ambiguity when a data project hits a technical blocker, including diagnosis, stakeholder communication, and recovery.
OfferUpTests conflict resolution and influence when a stakeholder challenges an architectural decision with meaningful business or technical stakes.
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