单项选择题
A.Save the baseline in the database
B.Save the baseline in the Database Control Home Page
C.Create a procedure to read and apply the baseline to disk I/O metrics
D.Apply the baseline to the disk I/O metrics in the Mange Metrics page
E.Alter the disk I/O metrics to include baseline by using the ALTER METRICScommnd
单项选择题 You work as a database administrator for Supportcenter.cn. Users complain that their query is taking a long time to complete. You suspect the database buffer cache size to be the reason， and you define an alert to be generated when the buffer cache hit metric goes below 85%. When you observe the dynamic performance views， you find that the buffer cache hit ratio is 81% but no alerts are being generated. What could be the reason for this problem？（）
单项选择题 Exhibit You work as a database administrator for Supportcenter.cn. While creating a new user or changing the password for existing users， the password must adhere to the restrictions specified in the exhibit. Which option would you use to achieve this objective？（）
单项选择题 YouworkasadatabaseadministratorforSupportcenter.cn.Youareusingthreedatabase，SupportCenterDB01，SupportCenterDB02，andSupportCenterDB03，ondifferenthostmachinesinyourdevelopmentenvironment.Thedatabaseserverconfiguration，suchasIPaddressandlistenerportnumber，changefrequentlyduetodevelopmentrequirements，andyouhavethetaskofnotifyingthedevelopersofthechanges.Whichconnectionmethodwouldyouusetoovercomethisoverhead？（）