单项选择题 Youpreviouslysecuredyourlistenerwithanencryptedpassword.However，youneedtosetanewpasswordforsecurityreasons.WhatisthecorrectmethodforsettinganewencryptedpasswordforthelistenerusingtheListenerControlutility？（）

单项选择题 Thelistenerhasshutdownunexpectedly.Youwanttoviewthelistenerlogfileandlistenertracefiletofindthecauseoftheproblem.Howcanyouviewthecontentsofthelistenerlogfileandthelistenertracefile？（）

单项选择题 You are maintaining the database of a company. The listener process， listener1， is configured for remote access. You have issued the following command：   LSNRCTL>STATUS listener1   Which information will NOT be displayed when you issue the above command？（）