Windows Server 2003具有（）个版本。
A、1
B、2
C、3
D、4
下列选项可以做C++标识符的是（ ）。
A、_256
B、fat/pig
C、delete
D、5char
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
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
Which two PL/SQL8 features are supported in Oracle Forms?（）
Amethods
Bobject tables
Cobject columns
Dcollection types
Eobject as stored procedure parameters
用户配置文件类型有哪四种？