Oracle OCP 1Z0 053 Q495(Validate Database)
495.Which statement is true regarding the VALIDATE DATABASE command?
A. It checks the database for intrablock corruptions only.
B. It checks for block corruption in the valid backups of the database.
C. It checks the database for both intrablock and interblock corruptions.
D. It checks for only those corrupted blocks that are associated with data files.
Answer: A
参考：http://docs.oracle.com/cd/B28359_01/backup.111/b28270/glossary.htm#CHDIADHG
interblock corruption
A type of block corruption in which the corruption occurs between blocks rather than within the block itself. This type of corruption can only be logical corruption.
interblock corruption是数据块之间的逻辑冲突
A type of block corruption in which the corruption occurs within the block itself. this type of corruption can be either a physical corruption or logical corruption.
intrablock corruption是数据块内部的冲突，这种冲突可能是物理的，也可能是逻辑的。
| 参考:Response | Intrablock Corruption | Interblock Corruption |
|---|---|---|
|
Detection |
All database utilities detect intrablock corruption, including RMAN (for example, the BACKUP command) and the DBVERIFY utility. If a database process can encounter theORA-1578 error, then it can detect the corruption and monitor it. |
参考：http://docs.oracle.com/cd/B28359_01/backup.111/b28270/rcmvalid.htm
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