单项选择题
A.Automatic statistics collection is stopped for the CUSTOMERS table.
B.Statistics for the CUSTOMERS table are locked and cannot be overwritten.
C.Existing statistics for the CUSTOMERS table become unusable for the query optimizer.
D.Subsequently， statistics gathered on the CUSTOMERS table are stored as pending statistics
单项选择题 You are installing Oracle Database 11g on a machine. When you run the installer， the Oracle Universal Installer（OUI） shows the message that says one of the product-specific prerequisite checks has failed：Checking available swap space requirements ...Expected result： 1512MBActual Result： 1018MB Check complete. The overall result of this check is： Failed <<<< Problem： The system does not have therequired swap space. What happens to the installation in this situation（）
单项选择题 YouareinstallingOracleDatabase11gonyourserver.DuringtheinstallationOracleUniversalInstaller（OUI） promptsyoutoenterthepathoftheinventorydirectoryandalsopromptsyoutospecifyanoperatingsystemgroupname. Whichstatementistrueinthiscase（）
单项选择题 You want to create a role to meet these requirements： 1. The role is to be protected from unauthorized usage. 2. The password of the role is not to be embedded in the application source code or stored in a table. method would you use to restrict enabling of such roles（）