单项选择题
A. Virtual private database
B. Virtual private catalog
C. RMAN virtual database
D. RMAN secure catalog
E. Oracle Database Vault
多项选择题 WhatisthepurposeoftheRMANrecoverycatalog？（）
单项选择题 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？（）
单项选择题 WhichRMANbackupcommandisusedtocreatetheblock-changetrackingfile？（）