REWE Group Interview Questions
The questions to prepare for REWE Group interviews, across all roles. Questions from real interview reports rank first. Updated daily.
Approach for maintaining data quality and integrity across ETL pipelines.
Compare batch and streaming data processing, including when each fits best in a pipeline.
Calculate daily sales and a date-based 30-day rolling average using PostgreSQL window functions.
Identify the main pitfalls that can distort A/B test interpretation and explain how to guard against them.
Investigate why a key KPI moved the wrong way after a product change and separate signal from noise.
Compare B-tree, hash, bitmap, composite, and covering indexes with range, list, and hash partitioning.
Compare interpretable and high-performing models for banking decisions, then justify the accuracy, transparency, fairness, and governance trade-off.
Identify transactions with missing fields or store-level amount outliers using PostgreSQL data-quality logic.
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