Which action(s) will cause a compression dictionary to be removed from a table?（）

A、Set the table COMPRESS attribute to NO.  

B、Set the table COMPRESS attribute to NO; run REORG against the table.  

C、Set the table COMPRESS attribute to NO; run INSPECTRESETDICTIONARY against the table.  

D、Set the table COMPRESS attribute to NO; run RUNSTATS against the table.

A DNS server for a large network is experiencing performance problems.  Which of the following options is the best solution to fix the problem？（）

A、Enable NIS

B、Purchase a larger server

C、Use /etc/hosts on all of the systems

D、Create secondary name servers throughout the network

在URL中不填写协议类型，IE浏览器默认使用（）协议。

A、FTP

B、Gopher

C、File

D、HTTP

Internet中域名与IP地址之间的翻译由（）完成。

A、域名服务器

B、代理服务器

C、FTP服务器

D、Web服务器

Which statements are true regarding the system-defined moving window baseline in Oracle Database 11g?（）

It does not allow you to change the moving window size.

Adaptive threshold functionalities use it by default to compute statistics.

It is created by default with the window size being equal to the AWR retention time.

It is created when the first snapshot is collected by the Automatic Workload Repository (AWR).

Which three statements about performance analysis by SQL Performance Analyzer are true? （）(Choose three.)

It detects changes in SQL execution plans.

It produces results that can be used to create the SQL plan baseline.

The importance of SQL statements is based on the size of the objects accessed.

It generates recommendations to run SQL Tuning Advisor to tune regressed SQLs.

It shows only the overall impact on workload and not the net SQL impact on workload.