多项选择题
A. Top SQL
B. snapshots
C. SQL Tuning sets
D. index access path
E. optimizer statistics
F. materialized view logs
单项选择题 YouaremanaginganOracleDatabase10gdatabasethatusesOracleManagedFiles（OMF）.Youenabledtheblockchangetrackingfeatureforthedatabase.Whichstatementregardingthechangetrackingfileistrue？（）
单项选择题 You execute the following command to enable a session in resumable mode： SQL> ALTER SESSION ENABLE RESUMABLE TIMEOUT 60； What is the impact of a timeout on the statements being suspended？（）
单项选择题 Inyourtestdatabase，youfindthatauser’ssessionisexecutingalotofSQLstatements，resultinginthegenerationofalargenumberoftracefiles.Whileinvestigatingthereason，youfindthatSQLtracehasbeenenabledattheinstancelevel.YouwanttodisableSQLtrace，remotely，onlyforthatusersessiontoreducethevolumeoftracedatabeinggenerated.Howdoyouachievethisobjective？（）