单项选择题
You have enabled backup optimization in RMAN. You issue the following RMAN command to configure a redundancy-based retention policy:
CONFIGURE RETENTION POLICY TO REDUNDANCY 3;
Which statement is true?（）
A. The command fails because you cannot configure a redundancy-based retention policy when backup optimization is enabled
B. Backup optimization is performed, but RMAN considers the redundancy-based retention policy when it determines which datafiles should be backed up
C. Backup optimization is permanently disabled
D. Backup optimization is temporarily disabled because a redundancy-based retention policy is specified
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A. a job
B. a program
C. a schedule
D. a PL/SQL procedure -
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Whichtwostatementsaboutworkloadcaptureandreplayoperationsaretrue？（）
A. The clients must be created manually on the test machines to perform more realistic testing.
B. Restart the database in RESTRICTED mode before beginning workload replay to enable a clean state for workload replay.
C. Restart the database in RESTRICTED mode before beginning workload capture to enable a clean state for capturing the workload.
D. The application state of the capture system must be identical to the application state of the replay system when the workload replay begins. -
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A. Cursor cache
B. Stored outline
C. SQL Tuning Set
D. Automatic Workload Repository （AWR） snapshots
