单项选择题

You want to rebuild a free list in the free lists of the EMPLOYEE table in the Scott schema. Which package will you use to accomplish this？（）

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

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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.

单项选择题

You are maintaining the PROD database of TeleSoft Corporation. You have initialized the following DB_BLOCK_CHECKING parameter in the init.ora file： DB_BLOCK_CHECKING = TRUE； What will be the result of setting this parameter？（）

A. Only data blocks of the SYSTEM tablespace will be checked.
B. Only data blocks of the SYSAUX tablespace will be checked.
C. A checksum will occur only on the checkpoint.
D. A checksum will occur every time a block is modified.