052-004題解析

pxbibm發表於2014-03-31

4.

Your test database is running in NOARCHIVELOG mode. Which statement is true regarding the type of backups that can be performed on the database?

A.You can perform online whole database backups.

B.You can perform offline whole database backups.

C.You cannot perform schema-level export/import operations.

D.You can perform the backup of only the SYSTEM tablespace when the database is open.

Answer: B

答案解析:

在非歸檔模式下,只能在資料庫未開啟的情況下做一致性的冷備份,即離線備份。所以選B.是因為進行備份時,資料檔案頭中的系統更改號(SCN) 與控制檔案中的SCN 相匹配。

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