单项选择题

You want to disable resumable space allocation for all sessions.Which value should be assigned to the RESUMABLE_TIMEOUT parameter to disable resumable space allocation for all sessions？（）

A.0
B.10
C.100
D.NULL

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单项选择题

Examine the following scenario:
The target database instance is running. The most recent backup available for the target database was taken two days ago. Log files switches have occurred in last two days. The target database is duplicated on the same host, using the Recovery Manager (RMAN) duplicate command as follows:

Which statement is true about the duplicate database in this scenario?（）

A. It contains data till the last backup
B. It contains all data from target database until the current time
C. It contains all data from only the committed transactions in the target database
D. It contains all data except that which is used by the transactions in the current online redo file of target database

单项选择题

The Database Resource Manager is automatically enabled in the maintenance window that runs the Automated Maintenance Task. What is the reason for this？（）

A. to prevent the creation of an excessive number of scheduler job classes
B. to allow the Automated Maintenance Tasks to use system resources without any restriction
C. to allow resource sharing only among the Automated Maintenance Tasks in the maintenance window
D. to prevent the Automated Maintenance Tasks from consuming excessive amounts of system resources

单项选择题

You executed the following commands：
SQL> ALTER SESSION SET OPTIMIZER_USE_PENDING_STATISTICS = false；
SQL> EXECUTE DBMS_STATS.SET_TABLE_PREFS（’SH’， ’CUSTOMERS’， ’PUBLISH’，’false’）；
SQL> EXECUTE DBMS_STATS.GATHER_TABLE_STATS（’SH’， ’CUSTOMERS’）；
Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session？（）

A. The statistics are stored in the pending statistics table in the data dictionary.
B. The statistics are treated as the current statistics by the optimizer for all sessions.
C. The statistics are treated as the current statistics by the optimizer for the current sessions only.
D. The statistics are temporary and used by the optimizer for all sessions until this session terminates.