单项选择题 Matthew has recently joined NetFx Corporation as a junior-level Database Administrator （DBA）. He is asked by his supervisor to verify the database for data block corruptions. He uses the DBVERIFY utility and finds that two data blocks are corrupted in the database.   What should Matthew use to identify the corrupted blocks as well as datafiles containing these blocks？（）

单项选择题 Whileperformingmonitoringandtuningthedatabase，youwanttoviewthesummarizedinformationaboutthewarninglevelalertsandcriticallevelalerts.WhichsectionoftheOracleEnterprisemanagerdisplaysthesummarizedinformationaboutthewarningandcriticallevelalerts？（）

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