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单项选择题X 纠错

You disabled the Flashback Database feature by using the following command：
SQL> ALTER DATABASE FLASHBACK OFF；
What would be the effect of this command on the existing flashback logs？（）

A. Flashback logs are not deleted.
B. Flashback logs are deleted automatically.
C. Flashback logs are deleted only if you are using Recovery Manager （RMAN）
D. Flashback logs are deleted only if you are using Oracle Manager Files （OFM）
E. Flashback logs are deleted only if you are using Automatic Storage Management （ASM）

参考答案：

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单项选择题

You observe that the senior database administrator always uses the following command when connecting to Recovery Manager （RMAN）， and then starts executing commands to backup the database files： % rman target / What would be the effect of this command？（）

A. RMAN would use the current operating system location to place the backup.
B. RMAN would use the control file of the target database to maintain the backup.
C. RMAN would use the recovery catalog of the target database to maintain the backup.
D. RMAN would use the control file of the target database to maintain the backup metadata.
E. RMAN would use the recovery catalog of the target database to maintain the backup metadata.

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单项选择题

Case 1：
1. Shut down the database and perform a backup.
2. Restore all the data files.
3. Mount the database.
4. Recover the database.
5. Without applying all the redo log files， open the database using the RESETLOGS option.
6. Back up the database.
Case 2：
1. Shut down the database and perform a backup.
2. Restore only the data files of the tablespace where user error damaged the data.
3. Mount the database.
4. Recover the database.
5. Open the database with the RESETLOGS option.
6. Back up the database.
Case 3：
1. Shut down the database.
2. Restore the data files.
3. Open the database.
4. Perform recovery to the current point in time.
Which case has the correct steps for an incomplete recovery？（）

A. Only case 1
B. Only case 2
C. Only case 3
D. Case 1 and 2
E. Case 2 and 3
F. Case 1 and 3
G. All cases， case 1， case 2， case 3

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单项选择题

Exhibit， Viewing the Exhibit and examine the Flashback Database architecture. Identify the missing component （shown with a "？`"= in the Flashback Database architecture.（）

A. DBWn
B. RVWR
C. ARCH
D. RECO
E. TRWR

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单项选择题

You have created a resource plan， DB_PLAN， using DBMS_RESOURCE_MANAGER.CREATE_SIMPLE_PLAN and you want to impose a restriction on utilization of resources by the database users. Which step must be performed before you can start using the resource plan？（）

A. assign users to consumer groups
B. set the resource plan for the instance
C. configure a simple resource plan and specify plan directives
D. configure a complex resource plan and specify plan directives

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单项选择题

While setting up the threshold for tablespace space usage metrics for one of your tablespaces， you define the critical threshold as 60% and warning threshold as 75%. What would be the result of this setting？（）

A. It would result in an error because the warning threshold cannot be more than the critical threshold.
B. The warning threshold is ignored and alerts would be generated when space usage exceeds the critical threshold.
C. The critical threshold is ignored and alerts would be generated when space usage exceeds the warning threshold.
D. Both threshold values are used and alerts are generated when space usage exceeds the respective threshold values.

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单项选择题

Manually， you set the consumer group of all of the newly created users to MYDB_GRP. You want the users to be able to change their consumer groups as per the application requirement. What was the first step that was needed in the process to achieve this objective？（）

A. The user must have been granted the DBA role.
B. The user must have been granted the switch privilege as a part of a role.
C. The user must have been granted the Resource Manager administrator privilege.
D. The user must have been granted the switch privilege by using the DBMS_RESOURCE_MANAGER_PRIVS package.

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单项选择题

By using the transaction identifier provided by（）for a particular row change， you can use the Flashback Transaction Query to see the operation performed by the transaction.

A. Flashback Table
B. Flashback Database
C. Flashback Version Query
D. The RMAN REPORT command
E. The DBA_PENDING_TRANSACTIONS view

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单项选择题

What effect should the loss of an index tablespace have on an Oracle instance that is running？（）

A. instance hangs
B. instance gets aborted
C. instance continues running
D. instance gets restarted automatically

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单项选择题

Why would you use the following FLASHBACK TABLE command？（）
FLASHBACK TABLE emp TO TIMESTAMP （’11：45’.’hh12：mi’）；

A. to undo the changes made to the EMP table since the specified time
B. to restore the EMP table that was wrongly dropped from the database
C. to view the transactions that have modified the EMP table since the specified time
D. to view the changes made to the EMP table for one or more rows since the specified time

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多项选择题

In the parameter file of your production database， the FAST_START_MTTR_TARGET parameter is set to 300 to optimize instance recovery. While observing the performance of the database during instance recovery， you find that the redo log files are not sized properly to support this activity. Which two sources could you use to determine the optimal size of the redo log files？（）

A. the V$LOG view
B. the V$DBFILE view
C. the V$LOGFILE view
D. the V$INSTANCE_RECOVERY view
E. Oracle Enterprise Manager Database Control

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