单项选择题

You executed the following command: RMAN> RECOVER COPY ……

You executed the following command:
RMAN> RECOVER COPY OF DATAFILE '/u01/app/oracle/oradata/orcl/users01.dbf';
Which statement regarding the above command is correct?（）

A. The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the image copy
B. The '/u01/app/oracle/oradata/orcl/users01.dbf' data file is recovered from the last incremental backup
C. Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are updated with all changes up to incremental backup SCN. '/ u01/app/oracle/oradata/orcl/users01.dbf
D. Image copies of the '/u01/app/oracle/oradata/orcl/users01.dbf' data file are recovered using the above command if data file recovery fails

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热门试题

单项选择题You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）

A. RMAN reads the block change tracking file only when it performs the incremental level 0 backup.
B. RMAN reads the block change tracking file when it performs both incremental backups.
C. RMAN reads the block change tracking file only when it performs the incremental level 1 backup.
D. RMAN does not read the block change tracking file when it performs either incremental backup.

单项选择题You have three production databases, HRDB, FINDB, and ORGDB, that use the same ASM instance. At the end of the day, while all three production database instances are running, you execute the following command on the ASM instance : SQL> shutdown immediate; What is the result of executing this command?（）

A. The ASM instance is shut down, but the other instances are still running.
B. It results in an error because other database instances are connected to it.
C. All the instances, including the ASM instance, are shut down in the IMMEDIATE mode.
D. HRDB, FINDB, and ORGDB instances are shut down in the ABORT mode and the ASM instance is shut down in the IMMEDIATE mode.

多项选择题Identify three key features of ASM.（）

A. file striping
B. allocation unit mirroring
C. automatic disk rebalancing
D. automatic file size increment
E. automatic undo management

单项选择题As shown in the diagram, in-memory statistics are transferred to the disk at regular intervals. Which background process performs this activity?（）

A. CKPT
B. SMON
C. MMON
D. DBWR

多项选择题Immediately after adding a new disk to or removing an existing disk from an ASM instance, you find that the performance of the database goes down initially until the time the addition or removal process is completed, and then gradually becomes normal. Which two activities would you perform to maintain a consistent performance of the database while adding or removing disks?（）

A. Define the POWER option while adding or removing the disks
B. Increase the number of ARB processes by setting up a higher value for ASM_POWER_LIMIT.
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