关于Oracle12cCDB和PDB的说法错误的是？（）

A.如果同一个服务器上有多个数据库，则每个非CDB或CDB具有单独的相异实例

B.一个实例将与整个CDB关联

C.通常每个CDB有多个PDB

D.数据库的实例可以在非CDB和CDB之间共享

A.公用用户不可在root的数据字典中定义

B.在PDB自己的数据字典中定义本地用户，所以在该PDB之外该用户不可见

C.根据授予的权限，本地用户可以处理PDB内的应用程序数据或者使用数据库链接处理其他PDB的应用程序

D.公用用户不仅在根中其定义的位置而且在属于CDB的每个PDB中为已知

A. If no PDB plan is enabled for a pluggable database, then all sessions for that PDB are treated to an equal degree of the resource share of that pdb.

B. In a PDB plan, subplans may be used with up to eight consumer groups.

C. If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups across all PDBs in the cdb.

D. If no PDB plan is enabled for a pluggable database, then the PDB share in the CDB plan is dynamically calculated.

E. If a PDB plan is enabled for a pluggable database, then resources are allocated to consumer groups based on the shares provided to the PDB in the CDB plan and the shares provided to the consumer groups in the PDB plan.

A. The PDB must be open in read-only mode.

B. The PDB must be in mount state.

C. The PDB must be unplugged.

D. The PDB data files are always removed from disk.

E. A dropped PDB can never be plugged back into a multitenant container database (CDB).

A. The PDB must be open in read only mode.

B. The PDB must be dosed.

C. The unplugged PDB becomes a non-cdb.

D. The unplugged PDB can be plugged into the same multitenant container database (CDB)

E. The unplugged PDB can be plugged into another cdb.

F. The PDB data files are automatically removed from disk.

A.PDB提供了在线可视化工具

B.PDB是全世界唯一存储生物大分子3D结构的数据库

C.PDB库中收录的结构既有实验测得的，也有计算机预测的

D.PDB并不提供蛋白质的序列信息

A. Multitenant architecture can be deployed only in a Real Application Clusters (RAC) configuration.

B. Multiple pluggable databases (PDBs) share certain multitenant container database (CDB) resources.

C. Multiple CDBs share certain PDB resources.

D. Multiple non-RAC CDB instances can mount the same PDB as long as they are on the same server.

E. Patches are always applied at the CDB level.

F. A PDB can have a private undo tablespace.

A.本地临时表空间

B.异地用户和异地角色

C.本地用户连接到他们所在的PDB

D.应用程序表空间

You are connected to a pluggable database (PDB) as a common user with DBA privileges.The STATISTICS_LEVEL parameter is PDB_MODIFIABLE. You execute the following:SQL ＞ ALTER SYSTEM SET STATISTICS_LEVEL = ALL SID = ‘*’ SCOPE = SPFILE;Which is true about the result of this command？（）

A. The STATISTICS_LEVEL parameter is set to all whenever this PDB is re-opened.

B. The STATISTICS_LEVEL parameter is set to ALL whenever any PDB is reopened.

C. The STATISTICS_LEVEL parameter is set to all whenever the multitenant container database (CDB) is restarted.

D. Nothing happens; because there is no SPFILE for each PDB, the statement is ignored.

A. The CDB must be open.

B. The CDB must be in the mount stage.

C. The CDB must be in the nomount stage.

D. Alt existing PDBs must be closed.

A.PDB数据库是一级蛋白质数据库

B.PDB数据库存储大分子的3D结构

C.PDB数据库里既包含蛋白质的3D结构，也包含核酸的3D结构，以及二者的复合体结构

D.PDB数据库里只包含实验方法解析的大分子3D结构

E.PDB数据库是二级蛋白质数据库

F.PDB数据库只储存蛋白质分子的3D结构

G.PDB数据库里既包含实验方法解析的大分子3D结构，也包含计算机预测结构模型

H.X射线衍射法解析的蛋白质3D结构不能提交到PDB数据库