You observe that database performance has degraded over a period of time. While investigating the reason， you find that the size of the database buffer cache is not large enough to cache all the needed data blocks. Which advisory component would you refer to， in order to determine the required size of the database buffer cache？（） Memory Advisor。 Segment Advisor。 SQL Tuning Advisor。 SQL Access Advisor。 Automatic Database Diagnostic Monitor （ADDM）。
凡尔赛一华盛顿体系形成后，法国元帅福煦曾预言：“这不是和平，这是20年的休战。”这主要是因为（）。 资本主义大国与殖民地半殖民地的矛盾依然存在。 两种社会制度之间的矛盾终将激化。 没有消除各大国之间的矛盾，却埋下了更大冲突的种子。 法西斯专政的建立。
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。
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?（） PowerHA SystemMirror Basic Edition。 PowerHA SystemMirror Express Edition。 PowerHA SystemMirror Standard Edition。 PowerHA SystemMirror Enterprise Editio。
下列不属于电子认证服务的监管模式的是（） 强制性许可制度。 非强制性许可制。 注册制度。 行业自律。
Which of the following identifies and creates an index to minimize the DB time for a particular SQL statement?（）
