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Design a data warehouse for 7-11 or 24x7 stores

System Design/Architecturehard2.7 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in System Design/Architecture
Difficulty Split
15E|6M|158H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
McKinsey
Key Concepts Tested
joinoptimizationpartitionspark
Expert AnswerPremium
547 wordsIncludes code examplesInterview-ready
**Section 1 — The Context (The 'Why')** Retail data warehouses for 24x7 stores must support inventory, sales, and operational reporting across thousands of locations. The primary challenge is modeling slowly changing dimensions while supporting near-real-time stock levels....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like McKinsey. The answer also includes follow-up discussion points that interviewers commonly explore.

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