单项选择题
A. Compute the baseline statistics.
B. Take an immediate AWR snapshot.
C. Decrease the window size for the baseline.
D. Decrease the expiration time for the baseline.
单项选择题 You are managing an Oracle Database 11g instance with ASM storage. The ASM instance is down. To know the details of the disks in the DATA disk group ，you issued the following ASMCMD command： ASMCMD> lsdsk -I -d DATA Which statement is true regarding the outcome of this command？（）
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？（）