Which is the correct command to put the database in ARCHIVELOG mode？（）  

多项选择题WhatarethedifferentloggingmodesavailableinOracleDatabase11g？（）

A. NOLOG mode
B. NOARCHIVELOG mode
C. LOGGING mode
D. HOTDATABASE mode
E. ARCHIVELOG mode

单项选择题You backed up the database at 8 a.m. today using an online backup. Accounting made a large change to the underlying data between 10 a.m. and noon.  Which of the following actions would ensure that the changes could be recovered using the 8 a.m. backup？（）

A. Create a manual incremental online database backup.
B. Back up all the archived redo logs generated since the 8 a.m. backup.
C. Create a brand-new backup after all the changes have been applied.
D. There is no way to make the changes recoverable based on the 8 a.m. backup.
E. Perform an online backup of the tablespace（s） that contained changed data.

单项选择题YouwanttoputaspecifictablespacecalledMY_DATAinhotbackupmodesoyoucanbackitup.Whatcommandwouldyouuse？（）

A. alter tablespace MY_DATA begin backup
B. alter tablespace MY_DATA start backup
C. alter tablespace MY_DATA backup begin
D. alter MY_DATA begin backup
E. You cannot back up individual tablespaces

单项选择题When performing an online backup，what is the proper order of the following steps？（）   a. Issue the alter database end backup command. b. Back up the archived redo logs. c. Issue the alter database begin backup command.  d. Back up the database files.  e. Determine the beginning log sequence number. f. Determine the ending log sequence number.  g. Force a log switch with the alter system switch logfile command.

A.a， b， c， d， e， f， g
B.c， d， a， b， e， g， f
C.f， d， b， g， a， c， e
D.e， c， d， a， g， f， b
E.a， f， b， g， e， c， d

单项选择题YourdatabaseisinNOARCHIVELOGmode.Youstarttodoabackup，butyouruserscomplainthattheydontwantyoutoshutdownthedatabasetoperformthebackup.Whatoptionsareavailabletoyou？（）

A. Put the database in hot backup mode and perform an online backup，including backing up the  archived redo logs.
B. Just back up the database datafiles without shutting down the database.
C. You will have to wait until you can shut down the database to perform the backup.
D. Mark each datafile as backup in progress， back them up individually，and then mark them as backup not in progress. No archived redo logs will need to be backed up.
E. Only back up the datafiles that the user will not be touching. Once the user has finished what they were doing，you can shut down the database and back up the datafiles the user changed during the  course of the remaining backup