单项选择题
A.MEMORY_ONLYB.MEMORY_AND_DISKC.MEMORY_ONLY_SERD.MEMORY_AND_DISK_SER
A.sc.fromArray(data)B.sc.parallelize(data)C.sc.copyFromArray(data)D.sc.rdd(data)
A.mapB.distinctC.groupByKeyD.reduceByKey
A.DAGB.DBGC.DCGD.DDG
A.BroadcastJoinB.ShuffledHashJoinC.SortMergeJoinD.StreamHashJoin
A.arrowB.orc1.5C.nativeD.orc1.6
A.5MBB.10MBC.15MBD.20MB
A.snappyB.gzipC.lz4D.rar
A.df.write.format("parquet")B.df.write("parquet")C.df.parquetD.df.write.format.parquet
A.spark.read.format("json")B.spark.read("json")C.spark.jsonD.spark.read.format.json
A.createOrReplaceTempTableB.createOrReplaceTempViewC.createOrReplaceViewD.createOrReplaceTable