单项选择题 Observe the following warning in an RMAN session of your database instance：   WARNING： new failures were found since last LIST FAILURE command   Which statement describes the scenario that must have produced this warning？（）

单项选择题 Examine the output of the query that you executed to list the objects in the recycle bin: You verified that no table named SALES_TAB exists in the schema. Then you executed the following command to purge the objects in the recycle bin: SQL> PURGE TABLE sales_tab; What would be the outcome of this command?（）

多项选择题 The ORACLE_SID environment variable is set to +ASM. ASMLIB is not used in the configuration. You executed the following command to startup the Automatic Storage Management (ASM) instance. SQL> STARTUP; Which two activities are performed during a successful start up operation? （）(Choose two.)