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Interview questions · medium
What strategies can you use to handle skewed data in Spark?
How do you handle data skewness in Spark?
What challenges did you encounter when scaling your project?
Lambda vs. Glue: Discuss use cases for both services.
Calculate the cumulative transaction amount for each month using a transaction table.
Find the 2nd highest salary for each department using the DENSE_RANK() function.
Predicted outputs for different join types using two sample tables with NULL values.
Why not use ROW_NUMBER() instead? Discuss pros and cons.
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