单项选择题
You have created an Oracle 10g database named SALES， which will be used by an application named SalesOrders. Users of the SalesOrders application complain that application response time is slow when they generate reports. The SalesOrders application accesses a table that contains 10 million rows. You decide to create an index on this table using the NOLOGGING option so that the index creation process is completed in the least amount of time. Which of the following is NOT true about an index created with the NOLOGGING option？（）
A. The index can be changed from NOLOGGING to LOGGING
B. The index cannot be recovered even in the ARCHIVELOG mode.
C. The index can only be created if the base table is created with the NOLOGGING option.
D. The index can be recovered if you perform a backup after the CREATE INDEX statement.
相关考题
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单项选择题
YourdatabasecontainstwotemporarytablespacesnamedTEMPandTEMP1.TheTEMPtablespaceisthedefaulttemporarytablespaceforthedatabase，andtheTEMP1tablespacewascreatedatdatabasecreation.YouwanttoincreasethesizeofthetempfilefortheTEMPtablespaceanddroptheTEMP1tablespacefromthedatabase.ThedatabaseisnotusingOracle-ManagedFiles（OMF）.WhichstatementmustyouusetoensurethatwhenyoudroptheTEMP1tablespacefromthedatabase，itscorrespondingoperatingsystemfileisalsodeleted？（）
A. DROP TABLESPACE temp1；
B. DROP TABLESPACE temp1 INCLUDING CONTENTS；
C. DROP TABLESPACE temp1 INCLUDING CONTENTS AND DATAFILES；
D. DROP TABLESPACE temp1 INCLUDING CONTENTS CASCADE CONSTRAINTS； -
单项选择题
YourdatabaseisinNOARCHIVELOGmode.Thedatabasehasthreeonlineredologgroups，andeachgroupcontainsthreeonlineredologmembers.Theonlineredologmembersarestoredacrossthreeharddisks，E，F，andG，respectively.HarddiskGcrashedwhiletheLGWRbackgroundprocesswaswritingredoinformationtotheonlineredologfiles.Whateffectwillthiscrashhaveonthedatabase？（）
A. The database will operate normally without generating any redo.
B. The database will hang， and you must shut down and restart the instance.
C. The database will crash， and you must recover the database from the point of failure.
D. The database will operate normally and will generate minimal redo for the tables created with the NOLOGGING clause. -
单项选择题
Atdatabasestartup，youdiscoverthatoneofthediskscontaininganindextablespacehasbeenlostduetoamediafailure.Abackupofthelostindextablespaceisnotavailable.Youhaveallthenecessaryscriptstorecreatetheindexes.Youneedtore-createtheindexesinanewindextablespace.Whichactionmustyouperformbeforere-creatingtheindexes？（）
A. Start the database in OPEN mode， and create a new index tablespace.
B. Start the database in OPEN mode， and drop the lost index tablespace from the database.
C.Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.
D. Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.
