（77）You executed the following command to perform a backup of the USERS tablespace:

SQL> ALTER TABLESPACE users BEGIN BACKUP;

ALTER TABLESPACE users BEGIN BACKUP

*

ERROR at line 1:

ORA-01123: cannot start online backup; media recovery not enabled

What could be the reason for this error?

A. The MTTR Advisor is disabled.

B. The database is in NOARCHIVELOG mode.

C. The tablespace is already in backup mode.

D. The Flash Recovery Area is not configured.

答案：（B）

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Oracle 11G OCP 1Z0-052 77