题目内容
(请给出正确答案)
[单选题]
有一个键值对RDD,名称为pairRDD,它包含4个元素,分别是(“Hadoop”,1)、(“Spark”,1)、(“Hive”,1)和(“Spark”,1),则pairRDD.reduceByKey((a,b)=>a+b)执行结果得到的RDD,它里面包含的元素是
A.(“Hadoop”,2),(“Spark”,1),(“Hive”,1)
B.(“Hadoop”,1),(“Spark”,2),(“Hive”,1)
C.(“Hadoop”,2),(“Spark”,2),(“Hive”,2)
D.(“Hadoop”,1),(“Spark”,2),(“Hive”,2)
答案
A、(“Hadoop”,2),(“Spark”,1),(“Hive”,1)
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