單項(xiàng)選擇題

You lost the PRODSTD tablespace， which was read/write. The tablespace was read-only when the last backup was performed. How would you recover the tablespace？（）

A. restore the tablespace from the backup； there is no need to apply the redo information
B. restore the full database to recover the data up to the point when you performed the backup
C. restore the tablespace from the backup and then perform a recovery using the backup control file
D. restore the tablespace from the backup and then recover the tablespace； all the redo information from the point when the tablespace was made read/write is applied

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單項(xiàng)選擇題

The current time is 12：00 noon. You want to recover the USERS tablespace from a failure that occurred at 11：50 a.m. You discover that the only member of an unarchived redo log group containing information from 11：40 a.m. onwards is corrupt. With reference to this scenario， if you are not using Recovery Manager （RMAN）， which recovery method would you use？（）

A. time-based recovery
B. log sequence recovery
C. cancel-based recovery
D. change-based recovery

多項(xiàng)選擇題

Immediately after adding a new disk to or removing an existing disk from an Automatic Storage Management （ASM） instance， you find that the performance of the database decreases initially， until the addition or removal process is completed. Performance then gradually returns to normal levels. Which two activities could you perform to maintain a consistent performance of the database while adding or removing disks？（）

A. increase the number of checkpoint processes
B. define the POWER option while adding or removing the disks
C. increase the number of DBWR processes by setting up a higher value for DB_WRITER_PROCESSES
D. increase the number of slave database writer processes by setting up a higher value for DBWR_IO_SLAVES
E. increase the number of ASM Rebalance processes by setting up a higher value for ASM_POWER_LIMIT during the disk addition or removal

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You lost the PRODSTD tablespace， which was read/write. The tablespace was read-only when the last backup was performed. How would you recover the tablespace？（）

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You lost the PRODSTD tablespace， which was read/write. The tablespace was read-only when the last backup was performed. How would you recover the tablespace？（）