GitLab Data Engineer Interview Questions
The questions to prepare for a GitLab Data Engineer interview. Questions from real interview reports rank first. Updated weekly.
Use GROUP BY and SUM to rank the top 10 customers by total revenue from a single sales table.
GitLabExplain OLTP vs OLAP designs, including schema shape, workload patterns, and when each is appropriate in a data platform.
GitLabExplain how to tune a slow PostgreSQL query that joins several large transaction tables using indexes, join strategy, and partitioning.
GitLabCalculate GitLab Premium user week-over-week retention using joins, CTEs, date bucketing, and the LEAD window function.
GitLabAggregate monthly sales by product category and use LAG to calculate month-over-month changes.
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Benjamin MooreApproach for maintaining data quality and integrity across ETL pipelines.
GitLabSet up pipeline monitoring and alerting that catches critical failures quickly while limiting noisy alerts.
GitLabApproach for handling missing data in an ML data pipeline, including validation, imputation, and safe downstream consumption.
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Tests your learning habits and commitment to improving data engineering skills.
GitLabTests coding ability for data quality logic and algorithmic correctness.
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