单项选择题
A.SecondaryNameNodeB.DataNodeC.JobTrackerD.NameNode
A.SparkRB.SparkSQLC.Spark GraphXD.Spark Streaming
A.先启动HDFS,接着启动MapReduce,最后启动HbaseB.先启动Hbase,接着启动HDFS,最后启动MapReduceC.先启动MapReduce,接着启动HDFS,最后启动HbaseD.Hadoop和Hbase平台的运行和启动顺序无关