OCP考試題庫-185題

185.A shoot-out has erupted between your MS development teams using .NET and your Linux
development teams using Java. Knowing that your database is in danger, which command would you use
to back up your NOARCHIVELOG mode database using RMAN with compression?
A. backup database all
B. backup compressed database
C. backup as compressed backupset database;
D. backup as compressed backup database plus archivelog all;
E. backup as compressed backupset database plus compress archivelog all;
Answer: C 
這裡我有點疑惑，就是直接在資料庫OPEN時執行backup database是會出錯的,如下圖：


查詢了一下，NOARCHIVELOG MODE需要在MOUNT狀態下執行backup database命令:

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