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 weekly.
Use 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 PlatformsCalculate 30-day retention for users exposed to a Google Ads campaign using CTEs, joins, aggregations, and date filtering.
GoogleMeta PlatformsAnalyze weekly service delivery performance by team using joins, a CTE, date aggregation, and KPI calculations.
Deloitte
ReputationUse a hash map to find two array elements that sum to a target in O(n) time.
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.
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Explain how you improved a slow ETL pipeline on multi-terabyte data, including bottleneck analysis, tuning choices, and validation.
Meta PlatformsTests your judgment in designing reliable pipelines under latency and throughput constraints.
Meta Platforms