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
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
Which two PL/SQL8 features are supported in Oracle Forms?()
Amethods
Bobject tables
Cobject columns
Dcollection types
Eobject as stored procedure parameters
程序调试的任务是( )。
A、设计测试用例
B、验证程序的正确性
C、发现程序中的错误
D、诊断和改正程序中的错误
微机中,运算器的另一个名称是()。
A、算术运算单元
B、逻辑运算单元
C、算术逻辑单元
D、加法器