STMN的复用方式是()。
A、字节间插
B、比特间插
C、间插
D、统计复用
下列各组视图表达正确的一组视图是()。
A、(1)
B、(2)
C、(3)
D、(4)
软件工程的三要素是( )。
A、方法、工具和过程
B、建模、方法和工具
C、建模、方法和过程
D、定义、方法和过程
Windows Server 2003具有()个版本。
A、1
B、2
C、3
D、4
用户配置文件类型有哪四种?
The database users are connecting to the PROD database from different applications, thereby degrading the database performance. The senior database administrator suspects the large number of concurrent connections to be the reason for low performance and asks you to restrict the number concurrent connections per database user to one. Which action would you take to achieve this objective? ()
A、set the SESSIONS to 1 in the parameter file
B、grant SINGLE SESSION privilege to all of the users
C、set the SESSIONS_PER_USER to 1 in the users’ profile
D、grant RESTRICTED SESSION privilege to all of the database users
E、create a role with SINGLE SESSION privilege and assign the role to the users