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Interview questions
Describe a situation where you prioritized business needs over technical elegance. How did you manage trade-offs?
How do you handle NULL values in a SQL query to avoid incorrect results?
How do you secure sensitive customer data in a data warehouse?
How would you design a data model for an e-commerce platform?
Optimize a slow SQL query for a large orders table containing billions of rows.
What are Slowly Changing Dimensions (SCD), and how would you implement them for tracking customer data changes?
Write a SQL query to find the top 5 most ordered dishes in the last 30 days.
Write a query to identify duplicate customer entries based on email and phone number.
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