CCA Spark and Hadoop Developer Exam(CCA175)考試模擬題講解一(每日一更兩題)

NO.1 CORRECT TEXT(第一題:正確文本) Problem Scenario 49 : You have been given below code snippet (do a sum of values by key}, with intermediate output.(問題場景49:下面給出了代碼片段(按key進行求和),並提供中間輸出。) val keysWithValuesL
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