You plan to control idle sessions that are blocking other sessions from performing transactions. Your requirement is to automatically terminate these blocking sessions when they remain idle for a specified amount of time. How would you accomplish this task？（） Set metric threshold。 Implement Database Resource Manager。 Enable resumable timeout for user sessions。 Add directives to Automatic Database Diagnostic Monitor （ADDM）。
塞尺测量时塞片之间应无（）等杂物。
You are managing a single instance Oracle 10g database that utilizes the following parameters： Which of the following set of commands must you execute to enable Flashback Database？（） STARTUP MOUNT EXCLUSIVE ALTER DATABASE FLASHBACK ON； ALTER DATABASE OPEN；。 STARTUP MOUNT ALTER DATABASE FLASHBACK ON； ALTER DATABASE OPEN RESETLOGS；。 STARTUP MOUNT EXCLUSIVE ATLER DATABASE ARCHIVELOG； ALTER DATABASE FLASHBACK ON； ALTER DATABASE OPEN RESETLOGS；。 STARTUP MOUNT ALTER DATABASE ARCHIVELOG； ALTER DATABASE FLASHBACK ON； ALTER DATABASE OPEN；。
不适合于通电火灾（电起火）的灭火方法是：（） 用化学干燥剂灭火。 用二氧化碳灭火。 用柱状水灭火。 用卤化物灭火。
Which of the following is a valid way of putting a tablespace named DAVE_TBS into hot backup mode?（） alter tablespace DAVE_TBS backup mode。 alter tablespace DAVE_TBS start backup 。 alter tablespace DAVE_TBS begin backup 。 alter tablespace DAVE_TBS backup begin 。 alter tablespace DAVE_TBS backu。
View the Exhibit to examine the parameter values.
You are planning to set the value for the MEMORY_TARGET parameter of your database instance.
What value would you recommend?（）
