单项选择题
A. When a new log group is added， it would have one member in each disk group.
B. When a new log group is added， it would have two members in each disk group.
C. When a new tablespace is added， it would have one data file in each disk group.
D. When a new log file is added， it would have one member spread across the disk groups.
单项选择题 YoulostthePRODSTDtablespace，whichwasread/write.Thetablespacewasread-onlywhenthelastbackupwasperformed.Howwouldyourecoverthetablespace？（）
单项选择题 Thecurrenttimeis12：00noon.YouwanttorecovertheUSERStablespacefromafailurethatoccurredat11：50a.m.Youdiscoverthattheonlymemberofanunarchivedredologgroupcontaininginformationfrom11：40a.m.onwardsiscorrupt.Withreferencetothisscenario，ifyouarenotusingRecoveryManager（RMAN），whichrecoverymethodwouldyouuse？（）
多项选择题 ImmediatelyafteraddinganewdisktoorremovinganexistingdiskfromanAutomaticStorageManagement（ASM）instance，youfindthattheperformanceofthedatabasedecreasesinitially，untiltheadditionorremovalprocessiscompleted.Performancethengraduallyreturnstonormallevels.Whichtwoactivitiescouldyouperformtomaintainaconsistentperformanceofthedatabasewhileaddingorremovingdisks？（）