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已知一张表student存储在HBase中,向表中插入一条记录{id:2015001,name:Mary,{score:math}:88},其id作为行键,其中,在插入数学成绩88分时,正确的命令是
A.put 'student','2015001','score:math','88'
B.put 'student','2015001','88'
C.put 'student','2015001','math','88'
D.put 'student','score:math','88'
A.put 'student','2015001','score:math','88'
B.put 'student','2015001','88'
C.put 'student','2015001','math','88'
D.put 'student','score:math','88'
A、ADD TABLE test cj int
B、ADD TABLE test ALTER cj int
C、ALTER TABLE test DROP cj int
D、ALTER TABLE test ADD cj int
A、<"hello",1,1>、<"bigdata",1>和<"hadoop",1>
B、<"hello",2>、<"bigdata",1>和<"hadoop",1>
C、<"hello",<1,1>>、<"bigdata",1>和<"hadoop",1>
D、<"hello",1>、<"hello",1>、<"bigdata",1>和<"hadoop",1>
A、第二名称节点无法解决单点故障问题
B、HDFS HA可以解决单点故障问题
C、第二名称节点是热备份,而HDFS HA不是热备份
D、HDFS Federation使得HDFS的命名服务能够水平扩展
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