Citi Data Engineer Interview Questions
The questions to prepare for a Citi Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Merge two sorted singly linked lists into one sorted list by relinking existing nodes.
CitiTests your problem-solving process and communication during live coding.
CitiTests your coding ability under time pressure and your ability to reason about program behavior.
CitiDiscuss how cloud storage fits into ETL pipelines, including staging, data quality, and operational monitoring.
CitiApproach for maintaining data quality and integrity across ETL pipelines.
CitiCompare ETL and ELT, and explain when ELT is the better pipeline pattern.
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Tests your ability to write correct, efficient SQL for large-scale data extraction.
CitiTests query optimization skills and ability to improve performance on large datasets.
CitiAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
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Inc.
Benjamin MooreCompute daily agent call KPIs and SLA using joins, aggregations, and window ranking in a contact center model.
ADPUse joins, CTEs, and CASE logic to flag and fill missing financial fields for Qlik planning records.
Qlik