053-429

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

　　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.