单项选择题

kafka中的元数据是由下面哪个组件来进行存储的（）

A.jvm
B.hdfs
C.zookeeper
D.namenode

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单项选择题

A.ZREVRANK key member
B.ZSCORE key member
C.ZUNIONSTORE destination numkeys key [key ...]
D.ZSCAN key cursor [MATCH pattern][COUNT count]

单项选择题

A.ZSCORE key member
B.ZUNIONSTORE destination numkeys key [key ...]
C.ZREMRANGEBYSCORE key min max
D.ZREM key member [member ...]

单项选择题

A.LTRIM
B.LSET
C.LRANGE
D.RPOP