Question

what are the spark job and spark task and spark staging

Answer 1

In a Spark application, when you invoke an action on RDD, a job is created. Jobs are the main function that has to be done and is submitted to Spark. The jobs are divided into stages depending on how they can be separately carried out (mainly on shuffle boundaries). Then, these stages are divided into tasks. Tasks are the smallest unit of work that has to be done the executor.