如果文件系统中有两个文件重名，不应采用（）。

A、单级目录结构

B、树型目录结构

C、二级目录结构

D、A和C

Which three statements correctly describe the features of the I/O calibration process?（）

Only one I/O calibration process can run at a time.

It automates the resource allocation for the Automated Maintenance Tasks.

It improves the performance of the performance-critical sessions while running.

It can be used to estimate the maximum number of I/Os and maximum latency time for the system.

The latency time is computed only when the TIMED_STATISTICS initialization parameter is set to TRUE.

有三个关系R、S和T如下：则由关系R和S得到关系T的操作是（　　）。

A、并

B、投影

C、交

D、选择

CTAIS服务器端的主要功能是存储业务数据、提供部分业务处理逻辑，确保数据利用的安全、正确、完整、高效。

A、对

B、错

You have been tasked with creating Business Events for an E-Business Suite workflow project. Whatwould you use to create your Business Events?（）

A、Oracle Workflow Builder

B、Oracle Workflow Definition Loader

C、Oracle Business Event Definition Loader

D、Workflow Administrator Web page in E-Business Suite

若两台主机在同一子网中，则两台主机的IP地址分别与它们的子网掩码相“与”的结果一定（）。

A、为全0

B、为全1

C、相同

D、不同