多项选择题
A.adding a new user to the database
B.dropping a user from the database
C.dropping a table from the database
D.dropping a data file from a tablespace
E.adding a new tablespace to the database
多项选择题 Auserwantstoconnecttothedatabaseinstancefromanapplicationthatisrunningonaremotemachine.WhichtoolsshouldtheDBAusetoestablishtherequiredconfigurationtoensurethattheuserisabletoconnecttothedatabaseinstance？（）
单项选择题 YoudefineanalerttoberaisedwhentheUSERStablespaceusagehasreached80%ofthetotalspace.Whichareawouldyoureferto，inordertoconfirmthatthealerthasbeenraisedduetheevent？（）
多项选择题 YourequiretheOracleservertomanagetheundosegmentsandspaceamongvariousactivesessionsautomatically.Youcreatedanundotablespace，UNDO_TBS1，inyourdatabase.Whichtwoadditionalstepswouldyouperformtoachievethis？（）