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Interview questions · medium
When would you choose a Snowflake schema over a Star schema?
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?
How do partitions improve query performance in fact tables?
What's the difference between narrow and wide transformations?
When would you choose a broadcast join over a shuffle join? Any memory risks?
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