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What is dag – directed acyclic graph?
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Answer / George Boipai
A Directed Acyclic Graph (DAG) is a graph where there are no cycles and all edges point from one node to another. In the context of Apache Spark, a DAG represents the series of transformations and actions that need to be executed on an RDD, DataFrame, or Dataset in order to produce the desired output. Each node in the DAG represents an operation (transformation or action), and edges represent data dependencies between them.
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