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H13-723_V2.0 · Question #17
H13-723_V2.0 Question #17: Real Exam Question with Answer & Explanation
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Question
In Spark, assuming that lines is a DStream object, which of the following statements can periodically count the number of words on this stream?
Options
- AIines.flatMap(.split" "")).map(word => (word, 1)).reduce( +_).print()
- BIines.flatMap(.split" "")).map(word => (word,word.Iength())).reduceByKey ( +_).print()
- CIines.fIatMap(.spIit" "")).map(word => (word, 1)).reduceByKey( +_).print()
- DIines.flatMap(.split" "")).flatMap(word => (word, 1)).groupByKey( +_).print()
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