429.Which of the following supplied functions is used to identify external tables, directories, and BFILES?
A. DBMS_TDB.CHECK_DIRECTORIES
B. DBMS_TDB.CHECK_EXTERNAL
C. DBMS_TDB.CHECK_BFILE
D. DBMS_TDB.CHECK_EXT
Answer: B

参考：http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_tdb.htm#ARPLS68854

以下提供功能中的哪一个是用来确定外部表，目录和二进制文件的？

SQL> desc dbms_tdb;
FUNCTION CHECK_DB RETURNS BOOLEAN
参数名称                       类型                    输入/输出默认值?
------------------------------ ----------------------- ------ --------
TARGET_PLATFORM_NAME           VARCHAR2                IN
SKIP_OPTION                    NUMBER                  IN

FUNCTION CHECK_DB RETURNS BOOLEAN
参数名称                       类型                    输入/输出默认值?
------------------------------ ----------------------- ------ --------
TARGET_PLATFORM_NAME           VARCHAR2                IN

FUNCTION CHECK_DB RETURNS BOOLEAN

FUNCTION CHECK_EXTERNAL RETURNS BOOLEAN

PROCEDURE EXIT_TRANSPORT_SCRIPT
参数名称                       类型                    输入/输出默认值?
------------------------------ ----------------------- ------ --------
SHOULD_EXIT                    VARCHAR2                IN

The DBMS_TDB package reports whether a database can be transported between platforms using the RMAN CONVERT DATABASE command. It verifies that databases on the current host platform are of the same endian format as the destination platform, and that the state of the current database does not prevent transport of the database.
DBMS_TDB包报告数据库是否可以使用RMAN转换数据库命令在平台之间传输。验证当前的主机平台上的数据库endian格式相同的目标平台，以及当前数据库中的状态并不妨碍数据库的传输。

The DBMS_TDB.CHECK_EXTERNAL function returns the list of external files that will need to be copied to the destination system. The other answers are not valid. DBMS_TDB.CHECK_EXTERNAL函数返回外部文件的列表中，这些文件将需要被复制到目标系统。

其他的答案是无效的。

ITPub博客

1Z0-053 V13.02 Q429

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