Examine the section of the Health Check report given below:

檢查如下的health check報告如下：

DBMS_HM.GET_RUN_REPORT('HM_RUN_1061')Run Name : HM_RUN_1061 Run Id : 1061 Check Name : Data Block Integrity Check Mode : REACTIVE Status : COMPLETED Start Time : 2007-05-12 22:11:02.032292 -07:00 End Time : 2007-05-12 22:11:20.835135 -07:00 Error Encountered : 0

Source Incident Id : 7418 Number of Incidents Created :0

Which two statements are true regarding the Health Check report? (Choose two.)

哪兩個針對health check報告是正確的？

A. Health Check was performed manually.

手動檢查

B. Health Check was performed to check the disk image block corruptions.

用來檢查disk image block corruptions.

C. Health Check was performed to check interblock and intersegment corruption.

用來檢查block和segment中間的損壞

D. Health Check was performed to verify(確認) the integrity(完整性) of database files and report failures.

用來檢查資料檔案的完整性並報告錯誤

E. Health Check was performed by the Health Monitor automatically in response to a critical(關鍵) error.

會被自動執行來應對關鍵錯誤

知識點：11g後，Health Monitor這個框架來執行health check。

health check包括detect file corruptions, physical and logical block corruptions, undo and redo corruptions, data dictionary corruptions，recommendations for resolving problems。 判斷出B正確，CD錯誤。

兩種方法執行：

Reactive—The fault diagnosability infrastructure can run health checks automatically in response to a critical error.E錯誤

Manual—As a DBA, you can manually run health checks using either the DBMS_HM PL/SQL package or the Enterprise Manager interface.        A正確。

兩種模式：

DB-online   資料庫mount/open

DB-offline   the instance is available but the database itself is closed (nomount)

答案：AB