多项选择题

Identify the channel settings that can be performed using the CONFIGURE CHANNEL or ALLOCATECHANNEL commands in RMAN（） (choose all that apply)

A. Limiting the input/output (I/O) bandwidth consumption
B. Specifying the size of backup sets and backup pieces
C. Specifying vendor-specific information for a media manager
D. Specifying the parallelism for backup and restore operations

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单项选择题

To generate recommendations to improve the performance of a set of SQL queries in an application， you execute the following blocks of code：
BEGIN
dbms_advisor.create_task（dbms_advisor.sqlaccess_advisor，’TASK1’）；
END； /
BEGIN
dbms_advisor.set_task_parameter（’TASK1’，’ANALYSIS_SCOPE’，’ALL’）； dbms_advisor.set_task_parameter（’TASK1’，’MODE’，’COMPREHENSIVE’）；
END；
/
BEGIN
dbms_advisor.execute_task（’TASK1’）；
dbms_output.put_line（dbms_advisor.get_task_script（’TASK1’））；
END；
/
The blocks of code execute successfully；however，you do not get the required outcome.
What could be the reason？（）

A. A template needs to be associated with the task.
B. A workload needs to be associated with the task.
C. The partial or complete workload scope needs to be associated with the task.
D. The type of structures （indexes， materialized views， or partitions） to be recommended need to be specified for the task.

多项选择题

What two are the prerequisites for enabling Flashback Database?（） (Choose two)

A. The database must be in ARCHIVELOG mode
B. The database must be in MOUNT EXCLUSIVE mode
C. The database must be opened in RESTRICTED mode
D. The database instance must be started in the NOMOUNT state
E. The database instance must have the keep buffer pool defined

单项选择题

You realize that the control file is damaged in your production database. After restoring the control file from autobackup, what is the next step that you must do to proceed with the database recovery?（）

A. Mount the database
B. Open the database in NORMAL mode
C. Open the database in RESTRICTED mode
D. Open the database with the RESETLOGS option