OCP-052考試題庫彙總（52）-CUUG內部解答版

Your DB_RECOVERY_FILE_DEST_SIZE IS 8G,Currently,5G of the space is used of which 4G consists of obsolete backups, You execute this command;

SQL> ALTER SYSTEM SET db_recovery_file_dest_size=2G;

What is the outcome?

A) It changes DB_RECOVERY_FILE_DEST_SIZE to 2G and deletes the obsolete backups

B) It changes DB_RECOVERY_FILE_DEST_SIZE to 5G

C) It fails because DB_RECOVERY_FILE_DEST_SIZE is a static parameter

D) It changes DB_RECOVERY_FILE_DEST_SIZE to 2G without deleting valid backups

E) It fails because the new size is less than 5G

Answer: D (驗證過)

CUUG：由於當前還有空閒的空間 3G,因此無需刪除有效和無效的備份。

趙：網友選 A 待驗證。我的認爲有效的備份只有 1G，小於被修改後的 2G，不須要刪除過期的備份。

題譯：DB_Recovery_file_DEST_size 爲 8G，目前使用的空間爲 5G，其中 4G 由過期的備份組成。

其餘：A 實測不會刪除