单项选择题
A. The shutdown proceeds immediately. The shutdown proceeds as soon as all transactions in the PDBs are either committed or rolledhack.
B. The shutdown proceeds as soon as all transactions in the CDB are either committed or rolled back.
C. The shutdown proceeds as soon as all transactions in both the CDB and PDBs are either committed or rolled back.
D. The statement results in an error because there are open PDBs.
单项选择题 An application accesses a small lookup table frequently. You notice that the required data blocks are getting aged out of the default buffer cache. How would you guarantee that the blocks for the table never age out?（）
多项选择题 You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs). Examine the query and its output: Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file?（）
多项选择题 Which three statements are true about Automatic Workload Repository (AWR)?（）