Which additional configuration must be completed when setting up role restrictions using certificates? （）

A、Set up a certificate authentication server.

B、Configure the authentication realm to remember certificate information.

C、Configure the authentication realm to use a certificate server for authentication.

D、Configure a role mapping rule requiring certification information to map user to role.

You notice that the performance of the database has degraded because of frequent checkpoints. Which two actions resolve the issue（）

Disable automatic checkpoint tuning.

Check the size of the redo log file size and increase the size if it is small.

Set the FAST_START_MTTR_TARGET parameter as per the advice given by the MTTR Advisor. 

Decrease the number of redo log members if there are more than one redo log members available in each redo log group.

某计算机有16个通用寄存器，采用32位定长指令字，操作码字段（含寻址方式位）为8位，Store指令的源操作数和目的操作数分别采用寄存器直接寻址和基址寻址方式，若基址寄存器可使用任一通用寄存器，且偏移量用补码表示，则Store指令中偏移量的取值范围是（　　）。

A、－32768～＋32767

B、－32767～＋32768

C、－65536～＋65535

D、－65535～＋65536

下列寻址方式中，最适合按下标顺序访问一位数组元素的是（　　）。

A、相对寻址

B、寄存器寻址

C、直接寻址

D、变址寻址

Which two statements are true concerning the Resource Manager plans for individual pluggabledatabases (PDB plans) in a multitenant container database (CDB)?（）

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.

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

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

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

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.

Which of the following technologies causes a single processor to appear as multiple processors within System Properties in a Windows Server？（）

A、 RISC

B、 Multicore

C、 Symmetric multi-processing

D、 Hyper-V