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Interview questions
Optimization techniques - partitioning, caching, broadcast joins, bucketing
Removing duplicates - ROW_NUMBER() or DISTINCT
Serverless vs. Dedicated SQL pools
Write a query for second-highest salary using LIMIT, OFFSET, or ROW_NUMBER()
Accumulators - use as shared variable for write-only operations
Broadcast join - how it optimizes joins
Databricks notebooks vs. Fabric notebooks - differences
Schema evolution - techniques for handling schema changes in PySpark
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