How can you reverse the effects of an ALTER DISKGROUP ... DROP DISK command if it has not yet completed？（）  

单项选择题You want to migrate your database to ASM， so you have done a clean shutdown， made a closed backup of the entire You wa database， noted the location of your control files and online redo log files， and changed your spfile to use OMF. The last step is to run an RMAN script to do the conversion.  Using the following steps，what is the correct order in which the following RMAN commands should be executed？（）   1. STARTUP NOMOUNT  2. ALTER DATABASE OPEN RESETLOGS  3. SQL  ALTER DATABASE RENAME ，，logfile1 path TO ，，+dgrp4 ，，  # plus all other logfiles  4. SWITCH DATABASE TO COPY  5. BACKUP AS COPY DATABASE FORMAT ，，+dgrp4 6. ALTER DATABASE MOUNT  7. RESTORE CONTROLFILE FROM ，，controlfile_location

A. 2， 5， 3， 1， 7， 6， 4
B. 1， 7， 6， 5， 4， 3， 2
C. 5， 1， 2， 7， 4， 6， 3
D. 7， 3， 1， 5， 6， 2， 4

单项选择题As DBA for the Rebel Alliance you have decided that you need to facilitate some redundancy in your database. Using ASM， you want to create a disk group that will provide for the greatest amount of redundancy for your ASM data （you do not have advanced SAN mirroring technology available to you， unfortunately）.  Which of the following commands would create a disk group that would offer the maximum in data redundancy？（）

A.A
B.B
C.C
D.D
E.E

单项选择题WhenanASMinstancereceivesaSHUTDOWNNORMALcommand，whatcommanddoesitpassontoalldatabaseinstancesthatrelyontheASMinstancesdiskgroups？（）

A. TRANSACTIONAL
B. IMMEDIATE
C. ABORT
D. NORMAL

单项选择题WhichinitializationparameterinanASMinstancespecifiesthediskgroupstobeautomaticallymountedatinstancestartup？（）

A. ASM_DISKMOUNT
B. ASM_DISKGROUP
C. ASM_DISKSTRING
D. ASM_MOUNTGROUP

单项选择题WhatisthedefaultAUsizeofanASMdiskgroup？WhatisthemaximumAUsizeinanASMdiskgroup？（）

A. 100KB default， 10TB maximum
B. 256KB default， 1024MB maximum
C. 10MB default， 126PB maximum
D. 64KB default， 1EB maximum
E. 1MB default， 64MB maximum