Questions tagged spark · medium
What is the difference between repartition and coalesce in Apache 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.
Explain the differences between Data Warehouse, Data Lake, and Delta Lake
What is the difference between partitioning and bucketing in Spark, and when would you use bucketing?
What strategies can you use to handle skewed data in Spark?
Explain the difference between Spark's map() and flatMap() transformations.
Explain the concept of Broadcast Join in Spark. When should it be used?
Tell me about a time when you faced a challenging situation at work and how you handled it.
What challenges did you face, and how did you tackle them?
What would you do if a pipeline failed and you couldn't find the reason?
What is the role of AWS Lambda in a data engineering pipeline?
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