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What are the ways in which one can know that the given operation is transformation or action?
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Answer / Khalid Khan
In Spark, transformations like map(), filter(), and groupBy() return new RDDs but do not execute immediately. Actions like count(), collect(), and saveAsTextFile() actually trigger the computation and return a value. The difference can be recognized by checking if the operation returns a new RDD or has an explicit collect() or action method.
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