单项选择题
A.by using the STATUS command of the Listener control utility
B.by using the STATUS L1 command of the Listener control utility
C.by using the SHOW RULES command of the Listener control utility
D.by using the SET PASSWORD command of the Listener control utility
E.by searching for the PASSWORD_LISTENER entry in the listener.ora file
单项选择题 Youhavetwolistenerprocesses，namedL1andL2.Boththelistenerprocessesarecurrentlyfunctional.Whileviewingthelistener.orafileonyourdatabaseserver，youfindthefollowingentry：PASSWORDS_L1=（1sanfrjp43）Whatwouldbetheimpactofthissetting？（）
多项选择题 While creating a scheduler window using the DBMS_SCHEDULER package， a user logged in as DBMGR gets the error message insufficient privileges. Which two commands would you use to resolve this error？（）
单项选择题 In your production database there is a job， CALC_STAT， which has been scheduled to run every Friday at 5：00 p.m. CALC_STAT updates the optimizer statistics for the objects owned by the APPS schema. You want the task to be generic， thereby allowing users to modify the attributes of the task at run time without affecting the original task. Which component of Oracle Scheduler must you define to achieve this？（）