多项选择题
A. All administration tasks must be done to a specific pluggable database.
B. The pluggable databases increase patching time.
C. The pluggable databases reduce administration effort.
D. The pluggable databases are patched together.
E. Pluggable databases are only used for database consolidation.
多项选择题 Examine the following impdp command to import a database over the network from a pre-12c Oracledatabase (source): Which three are prerequisites for successful execution of the command?（）
多项选择题 Examine this command: SQL > exec DBMS_STATS.SET_TABLE_PREFS (‘SH’, ‘CUSTOMERS’, ‘PUBLISH’, ‘false’); Which three statements are true about the effect of this command?（）
单项选择题 In a recent Automatic Workload Repository (AWR) report for your database, you notice a high number of buffer busy waits. The database consists of locally managed tablespaces with free list managed segments. On further investigation, you find that buffer busy waits is caused by contention on data blocks. Which option would you consider first to decrease the wait event immediately?（）