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Interview questions
Explain a scenario-based question on Spark optimization and how you would troubleshoot performance issues.
Explain repartition vs. coalesce. Which one would you use to reduce shuffle operations?
How did you handle data ingestion and processing for large datasets?
How does Spark's Catalyst Optimizer improve query performance?
What is the salting technique, and when would you use it?
Describe the architecture of an ETL pipeline you built in your previous project.
How do you ensure data quality and consistency in your pipelines?
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