Define Actions in Spark.Databricks interview questions for experienced/Databricks Interview Questions and Answers for Freshers & Experienced

Define Actions in Spark.

An action helps in bringing back the data from RDD to the local machine. An action’s execution is the result of all previously created transformations. Actions triggers execution using lineage graph to load the data into original RDD, carry out all intermediate transformations and return final results to Driver program or write it out to file system.

reduce() is an action that implements the function passed again and again until one value if left. take() action takes all the values from RDD to a local node.

moviesData.saveAsTextFile(“MoviesData.txt”)

Posted Date:- 2021-09-25 05:59:43

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