[单选]
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?（）

A . The CHANGE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository(ADR)
B . The VALIDATE DATABASE command has detected new failures recorded in the Automatic Diagnostic Repository (ADR)
C . The ADVISE FAILURE command has detected new failures recorded in the Automatic Diagnostic Repository (ADR) since the last LIST FAILURE
D . The RECOVER command has detected new failures recorded in the Automatic Diagnostic Repository (ADR) since the last LIST FAILURE command was executed

Which of the following files should an administrator modify to configure dynamic caching？（） dynacache.xml。 cachespec.xml。 dynacache.conf。 cachemon.xml。 cachespec.conf。世界上通常用于衡量人口文化素质的指标是（）就业人口的平均受教育年限。每万人口中的大学生数。文盲率或识字率。每万人口中的科技人员数。义务教育普及和提高程度。 What two are the prerequisites for enabling Flashback Database？（） The database must be in ARCHIVELOG mode。 The database must be in MOUNT EXCLUSIVE mode。 The database must be opened in RESTRICTED mode。 The database instance must be started in the NOMOUNT state。 The database instance must have the keep buffer pool defined。世界地球日是每年的（） 4月22日。 12月1日。 3月12日。 5月1日。 Which of the following commands will display, in MB, the total, used, and free blocks of the currently mounted filesystems?（） df -m。 du -m。 df -vm。 du -vm。

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?（）

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[单选] 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?（）

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[单选]
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?（）