[单选]

A customer requires their application to have high availability within a data center, and also the ability to recover at a data center located 600km away in the event of an outage.
Which system software solution component supports the customer requirement?（）

Which statement is true regarding the retention policy for the incidents accumulated in the AutomaticDiagnostic Repository (ADR)?（） The incident metadata is purged when the problem is resolved and the DBA closes the SR。 The incident files and dumps are not retained in the ADR for the manually created incidents。 The incident files are retained but the incident metadata is purged when the problem is resolved and the DBA closes the SR。 The default setting is for one year after which the incident metadata is purged from the ADR and the files are retained for one month。 工程建设强制性条文具备（）。 法律性质。 可操作性。 施工指导性。 重大影响性。 验收依据性。 Which of the following identifies and creates an index to minimize the DB time for a particular SQL statement?（） The SGA Tuning Advisor。 The SQL Access Advisor。 The SQL Tuning Advisor。 The Memory Advisor。 创业团队可分为（）。 自发性创业团队。 群体性创业团队。 有核心主导的创业团队。 互补性创业团队。 物体结构形状愈复杂，虚线就愈多，为此，对物体上不可见的内部结构形状采用（）来表示。 旋转视图。 局部视图。 全剖视图。 端面图。

A customer requires their application to have high availability within a data center, and also the ability to recover at a data center located 600km away in the event of an outage.
Which system software solution component supports the customer requirement?（）