单项选择题
A.alert_ Certkiller .log
B.alertlog_ Certkiller .log
C.alert_log_ Certkiller .log
D.Certkiller _alert_log.log
E.log_alert_： Certkiller .log
F.trace_alert_ Certkiller .log
单项选择题 YouworkasadatabaseadministratorforCertkiller.com.Inaproductionenvironment，userscomplainabouttheslowresponsetimewhenaccessingthedatabase.YouhavenotoptimizedthememoryusageoftheOracleinstanceandyoususpecttheproblemtobewiththememory.Towhichtypeofobjectwouldyourefertodeterminethecauseoftheslowresponse？（）
单项选择题 YouworkasadatabaseadministratorforCertkiller.com.Thedatabaseisopen.Amediafailurehasoccurred，resultinginlossofallthecontrolfilesinyourdatabase.Whichstatementregardingthedatabaseinstanceistrueinthisscenario？（）
多项选择题 Youareworkingonatestdatabasewhereinstancerecoverytakesaconsiderableamountoftime.Howcanreducetherecoverytime？（）