单项选择题
A. The command succeeds but it retrieves only the disk names.
B. The command produces an error because the ASM instance is down.
C. The command succeeds but it shows only the status of the ASM instance.
D. The command succeeds and retrieves information by scanning the disk headers based on an ASM_DISKSTRING value.
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)
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？（）
多项选择题 What two are the prerequisites for enabling Flashback Database?（） (Choose two)