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Explain the operation transformation and action in Apache Spark RDD?
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Answer / Gagandeep
Transformations are a series of operations performed on an RDD that produce a new RDD. They are lazy, meaning they are not executed immediately but stored as tasks in a task graph. Examples include map(), filter(), and groupBy(). Actions are functions that return a value other than another RDD or DataFrame. Actions trigger the execution of all previous transformations and return the final result. Examples include count(), collect(), and saveAsTextFile().
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