ByteDance Data Engineer Interview Questions
The questions to prepare for a ByteDance Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Find the second highest salary in each department without using aggregate functions.
ByteDanceExplain OLTP vs OLAP designs, including schema shape, workload patterns, and when each is appropriate in a data platform.
ByteDanceTests understanding of schema design principles that impact data quality and maintainability.
ByteDanceRank TikTok Shop users by monthly spend using joins, aggregation, date truncation, and ROW_NUMBER().
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PulsePointCompute daily active users and a 7-day rolling average using a CTE, distinct counts, and window functions.
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Meta ITDetermine if a string reads the same forward and backward using a two-pointer scan.
ByteDanceMerge two sorted singly linked lists into one sorted list by relinking existing nodes.
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Approach for maintaining data quality and integrity across ETL pipelines.
ByteDanceExplain the ETL process, why it matters, and how it fits into a practical data pipeline.
ByteDanceRedesign a slow Databricks Spark ETL pipeline to cut runtime from 3 hours to under 60 minutes without breaking data quality or SLAs.
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