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Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?（）

A、Mysqlaccess

B、Mysqldump

C、Mysqlshow

D、Mysqlslow

E、Mysqldumpslow

Which High Availability solution can provide a consistent, time-delayed (for example, one hour) snapshot of the live production database?（）

A、MySQL Replication

B、Distributed Replication Block Device

C、Windows Server Failover Clustering

D、MySQL Cluster

Which is the packaging strategy of iDataPlex of the following？（）

A、Fourteen servers per rack likeBladeCenter

B、Two servers per rack for optimal cooling cost

C、One server per rack for optimal cooling and energy efficiency

D、Four servers per rack （twoexach half high） for optimal cooling

以下关于%ROWTYPE的作用说法正确的是（）。

A、使用%ROWTYPE来定义一个表示表中一行记录的变量

B、使用%ROWTYPE的变量不能实现将一行记录的部分字段赋值

C、使用%ROWTYPE将一个变量的数据类型与一张表中记录的各个列的数据类型保持一致

Referring to the exhibit, which statement is correct?（）

A、 The packets have exceeded the time-to-live value

B、 There is a loop

C、 The asterisks indicate a response time out

D、 The asterisks indicate that the traceroute is completed.