单项选择题

消息队列中，发送到队列中的消息被一个而且仅仅一个接收者所接收的模式是哪个？（）

A.Peer-to-Peer
B.发布订阅
C.装饰模式
D.mvc

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单项选择题

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

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 ...]