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Answer Posted / Gourav Pandey
"Accumulator": A variable that allows you to modify its value across multiple actions and tasks. They can be used for purposes such as counting the number of occurrences of a particular event, or storing intermediate results of a computation. Accumulators are useful when you need to calculate statistics over the data processed during the execution of Spark jobs, but don't want to store this data because it is large or unnecessary for your purposes."
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