单项选择题
A. DML and SQL statement results that do not match between the capture and replay systems
B. When errors that occur in the capture system dont occur in the replay system
C. Top SQL statements
D. Infrastructure or system-configuration differences
E. Time-of-day differences between capture and replay systems
多项选择题 Which two are the prerequisites to enable Flashback Data Archive?（） (Choose two.)
单项选择题 You issue the following RMAN command to set a retention policy on a database: RMAN>CONFIGURE RETENTION POLICY TO REDUNDANCY 2; What will be the outcome of issuing this command?（）
单项选择题 You plan to use Flashback Drop feature to recover a dropped table SALES_EMP. No other table with the same name exists in the schema. You query RECYCLEBIN and find multiple entries for the SALES_EMP table as follows: You then issue the following statement to recover the table: SQL> FLASHBACK TABLE sales_emp TO BEFORE DROP; What would be the outcome of the precedent statement?（）