单项选择题
A. The PDB must be open in read-only mode.
B. The PDB must be in mount state.
C. The PDB must be unplugged.
D. The PDB data files are always removed from disk.
E. A dropped PDB can never be plugged back into a multitenant container database (CDB).
多项选择题 You upgrade your Oracle database in a multiprocessor environment. As a recommended you execute thefollowing script:SQL > @utlrp.sqlWhich two actions does the script perform?（）
多项选择题 Identify two correct statements about multitenant architectures.（）
多项选择题 What are two benefits of installing Grid Infrastructure software for a stand-alone server before installing and creating an Oracle database?（）