多项选择题

Which two statements are true about Block Media Recovery （BMR）？（）

A. BMR increases the Mean Time To Recover （MTTR）.
B. BMR can only be implemented using Recovery Manager （RMAN）.
C. The blocks that need to be recovered are accessible during BMR.
D. BMR cannot be performed using cumulative incremental backups.
E. The datafile must be restored if most of the blocks in the datafile are corrupt.

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热门试题

单项选择题You issued the following command to analyze the SCOTT.EMP table for block corruption： ANALYZE TABLE SCOTT.EMP VALIDATE STRUCTURE； You received the following error： ORA-01578： ORACLE data block corrupted （file # %s， block # %s） How will you resolve the block corruption problem？（）

A. by using the DBMS_REPAIR package
B. by using the DB_BLOCK_CHECKING parameter
C. by using the DBVERIFY utility
D. will not be completely resolved until the hardware fault is corrected

单项选择题You received the following error： ORA-01578： ORACLE data block corrupted （file # %s， block # %s） Which file will you check to view additional information regarding the cause of this error？（）

A.the alert log file and the trace files
B. the redo log files
C. the control file
D. the change tracking file

单项选择题YouwanttorebuildafreelistinthefreelistsoftheEMPLOYEEtableintheScottschema.Whichpackagewillyouusetoaccomplishthis？（）

A. DBMS_REPAIR
B. DBMS_SCHDULER
C. DBMS_STATS
D. DBMS_RESOURCE_MANAGER

单项选择题You issue the following statement： SQL> SELECT FIRSTNAME， LASTNAME FROM HR.EMPLOYEE； You receive the following error： 01578： ORACLE data block corrupted （file# 6， block # 54） ORA-01110 ： data file 6： ’u01 oracle oradata data1.dbf’ How will you resolve this problem of data block corruption by reducing the mean time to recover （MTTR）？（）

A. by using the DBMS_REPAIR package
B. by using the DBVERIFY utility
C. by using Block Media Recovery
D. by issuing the ANALYZE TABLE HR.EMPLOYEES VALIDATE STRUCTURE command

单项选择题The datafiles of your database are ASM files. You are performing a check for datafile block corruption by using the DBVERIFY utility. What is a prerequisite for checking block corruption on an ASM datafile by using the DBVERIFY utility？（）

A. The block change tracking feature must be enabled.
B. OMF must be configured on your database.
C. The database must be in ARCHIVELOG mode.
D. A USERID must be supplied.