A.a， b， c， d， eB.e， d， a， b， cC.a， c， b， d， eD.d， b， c，……

单项选择题WhichisthecorrectcommandtoputthedatabaseinARCHIVELOGmode？（）

A. alter database archivelog
B. alter system enable archivelog mode
C. alter database enable archive
D. alter database archivelog enable
E. None of the above

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