Apache Spark preguntas y respuestas de entrevista
Question: What is the significance of Spark's lineage graph (DAG)?Answer: Spark's lineage graph (DAG) is a directed acyclic graph that represents the sequence of transformations and actions on RDDs. It helps in recovering lost data in case of node failure.Example:
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- What is the purpose of the Spark SQL module?
- Explain the difference between narrow and wide transformations in Spark.