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Interview questions
When would you choose a Snowflake schema over a Star schema?
How do you ensure data quality and validation in a fast-moving team?
Tell me about a time when a Spark job failed in production. How did you fix it?
What storage format would you choose for analytics-heavy workloads and why?
What happens if the NameNode goes down?
What's the time and space complexity of both solutions?
Given a list of intervals, merge the overlaps. How do you optimize it?
How would you test these functions with edge cases?
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