多项选择题
A.the port used by the listener
B.the protocol used by the listener
C.the server name where the listener runs
D.the log file and trace file destination for the listener
E.the database services to be registered with the listener
单项选择题 Theapplicationworkloadonyourdatabaseissamebetween10a.m.and11a.m.onweekdays.Suddenlyyouobservepoorperformancebetween10a.m.and11a.m.inthemiddleoftheweek.Howwouldyouidentifythechangesinconfigurationsettings，workloadprofile，andstatisticstodiagnosethepossiblecausesoftheperformancedegradation？（）
多项选择题 Whichtwostatementsaretrueaboutabitmapindex？（）
单项选择题 Examine the following commands executed in your database： SQL> ALTER SESSION RECYCLEBIN=ON； Session altered SQL> CREATE TABLE emp TABLESPACE tbsfd AS SELECT * FROM hr.employees； Table created. Further， you executed the following command to drop the table： SQL> DROP TABLE emp； Table dropped. What happens in this scenario？ （）