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Real questions from top companies in Spark/Big Data
What are the key components of the Spark execution model (Job, Stage, Task)?
What is Adaptive Query Execution (AQE) in Spark 3.x, and how does it improve performance?
What is Spark's Catalyst Optimizer? Explain its stages.
What is the difference between Spark RDDs, DataFrames, and Datasets?
What is the difference between repartition and coalesce in Spark?
What is the small-file problem in Spark, and how do you solve it?
When and how do you use Broadcast Join in Spark?
What is broadcasting in Spark, and why is it used? Can you give an example of its use?
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