Which of the following is a prerequisite for running DBMS_TDB.CHECK_DB to a successful completion？（）<br>A: The database must be in read-write mode.<br>B: The database must have no external files.<br>C: The database must open in read-only mode.<br>D: The database must be mounted but not opened.

Which of the following is a prerequisite for running DBMS_TDB.CHECK_DB to a successful completion？（）
A: The database must be in read-write mode.
B: The database must have no external files.
C: The database must open in read-only mode.
D: The database must be mounted but not opened.

出自：Oracle认证

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