Online Access Free Huawei.H13-723.v2022-01-13.q56 Practice Test (Page 13)

H13-723 Exam Question 56

In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?

A.Iines.fIatMap(_.spIit (" " )).map(word => (word, 1)).reduceByKey(_ +_).print()

B.Iines.flatMap(_.split (" " )).map(word => (word, 1)).reduce(_ +_).print()

C.Iines.flatMap(_.split (" " )).map(word => (word,word.Iength())).reduceByKey (_ +_).print()

D.Iines.flatMap(_.split (" " )).flatMap(word => (word, 1)).groupByKey(_ +_).print()

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