2. |
The command ALTER TABLESPACE <tablespacename> BEGIN BACKUP; performs which of the following actions:
Please select the best answer.
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A. |
Begins making a backup copy of the tablespace file <tablespacename>
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B. |
Prevents writes to tablespace <tablespacename> until the backup is complete
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C. |
Can be done if the database is in NOARCHIVELOG mode
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D. |
Causes a checkpoint and freezes the datafile header(s) for tablespace <tablespacename>
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