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Interview questions · hard
What is the small-file problem in Spark, and how do you solve it?
Glue ETL optimization: Performance improvement strategies?
Discuss stages and tasks in a Spark execution plan.
Persistence Storage Levels: When to use MEMORY_ONLY, MEMORY_AND_DISK, etc.
Write a Spark job to count word occurrences from an S3 dataset.
Design a working data pipeline to efficiently store, process, and report data.
Explain Spark's fault tolerance mechanisms.
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