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Interview questions
Describe a scenario where partitioning and bucketing would improve query performance.
What is the small-file problem in Spark, and how do you solve it?
Implement a query to find the top 5 customers by total sales amount.
Write an SQL query to find duplicate emails in a users table.
Why a batch process over real-time?
Glue ETL optimization: Performance improvement strategies?
How to manage AWS IAM roles and policies for data security?
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