Meta Platforms Data Engineer Interview Questions
The questions to prepare for a Meta Platforms Data Engineer interview. Questions from real interview reports rank first. Updated daily.
Compare two case-sensitive strings and return unmatched word occurrences using frequency maps while preserving source order.
Meta PlatformsUse a hash map and top-three greedy selection to maximize points from books in distinct categories.
Meta PlatformsFind the maximum average of any subarray of length at least k using binary search and transformed prefix sums.
Meta PlatformsUse SUM, GROUP BY, ORDER BY, and LIMIT to find the top 10 Healthfirst Marketplace customers by purchase total.
Meta PlatformsExplain OLTP vs OLAP designs, including schema shape, workload patterns, and when each is appropriate in a data platform.
Meta PlatformsExplain SQL window functions and when to use ROW_NUMBER() versus DENSE_RANK() for ranked ticket analysis.
Meta PlatformsSummarize annual user engagement with a left join, aggregation, and NULL-safe duration handling.
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Explain how you improved a slow ETL pipeline on multi-terabyte data, including bottleneck analysis, tuning choices, and validation.
Meta PlatformsEvaluates your system design thinking for building scalable data infrastructure.
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