countByKey() is an action that returns the number of occurrences for each u

Explain Spark countByKey() operation?

Question Posted / Ram Niwas Paswan

1 Answers
344 Views
I also Faced
E-Mail Answers

Answer Posted / Ram Niwas Paswan

countByKey() is an action that returns the number of occurrences for each unique key in a pair RDD (RDD of (K, V) pairs). The result is a Map[K, Long], where K is the key and Long is the count for each key.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer View All Answers

Please Help Members By Posting Answers For Below Questions

What is meant by Transformation? Give some examples.

328

Explain how RDDs work with Scala in Spark

355

List the advantage of Parquet file in Apache Spark?

474

What is the latest version of spark?

288