题目内容

公开市场回购是指公司在特定时间发出的以某一高出股票当前市场价格的水平，回购既定数量股票的要约。（）

A. 正确
B. 错误

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You are a professional level SQL Server 2005 database administrator in an international corporation named Wiikigo. You are experienced in implementing high-availability solutions， monitoring the database server， and design deployment. In the company， you major job is the deployment， maintenance and support of Microsoft SQL Server 2005. You work as a database administrator for your company. More than a month ago， the SQL 2005 Server computer is deployed in operation. There are some query performance problems last week. Therefore， you perform an investigation on the locking contention. From the sys.dm_os_wait_stats dynamic management view （DMV）， you can see a high value in the max_wait_time_ms column. You want to check out whether this value is a factor which leads to the current performance problems. In addition， the impact on database users should e cut to the least. Which action should be performed to achieve the goal？（）

A. To achieve the goal， the UPDATE STATISTICS command should be excuted.
B. To achieve the goal， the SQL Server Service should be restarted.
C. To achieve the goal， the SQL Server computer should be restarted.
D. To achieve the goal， the statistics in the dynamic management view （DMV） should be reset.

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