BlackRock Data Engineer Interview Questions
The questions to prepare for a BlackRock Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Merge two sorted arrays into one sorted array using a two-pointer linear scan.
BlackRockTests general problem-solving skills and ability to code under interview constraints.
BlackRockTests your ability to design thorough test coverage for file ingestion and edge cases.
BlackRockApproach for maintaining data quality and integrity across ETL pipelines.
BlackRockExplain how you identified and fixed a bottleneck in a data pipeline while preserving correctness and operational visibility.
BlackRockApproach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.
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Tests your ability to choose and justify database technologies based on requirements and constraints.
BlackRockTests understanding of schema design principles that impact data quality and maintainability.
BlackRockFind the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.
eClinicalWorks
Informatica
Spectraforce TechnologiesCalculate 30-day rolling average returns for in-scope assets using LAG, CTEs, and date-based window frames.
BlackRockAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
Total Wine & More
Inc.
Benjamin Moore