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Data engineering interview questions
What is the difference between repartition and coalesce in Apache Spark?
What is the difference between SparkSession and SparkContext in Spark?
What is the difference between cache() and persist() in Spark? When would you use each?
What is the difference between groupByKey and reduceByKey in Spark?
What is the difference between narrow and wide transformations in Apache Spark? Explain with examples.
What strategies can you use to handle skewed data in Spark?
Can you explain the architecture of Apache Spark and its components?
Describe the difference between Spark RDDs, DataFrames, and Datasets.
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