A developer is designing a web application which extensively uses EJBs and JMS. The developer finds thatthere is a lot of duplicated code to build the JNDI contexts to access the beans and queues. Further，because of the complexity， there are numerous errors in the code. Which J2EE design pattern provides asolution for this problem？（）

A、Command

B、Transfer Object

C、Service Locator

D、Session Facade

E、Business Delegate

相关问题推荐

• In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE;  Which two operations do you need to perform after restoring the control file from backup？（）

  A

  shut down and restart the instance

  B

  add new tempfiles to the temporary tablespaces after recovery

  C

  perform a media recovery and open the database with the RESETLOGS option

  D

  perform a media recovery and bring the database to NOARCHIVELOG mode

  查看答案

• 桥接器可以为业务忙的网络分段从而来减少每段上的通信量以及提高性能。同时它还可以过滤网络广告信息，只允许必要的通信信息通过桥接器到达另外的网络。

  A、对

  B、错

  查看答案

• You enabled Automatic Shared Memory Management. The initialization parameters are set as shown below：  SGA_TARGET= 10GB  SGA_MAX_SIZE = 14GB  STREAMS_POOL_SIZE = 1GB SHARED_POOL_SIZE = 3GB  Which two statements are correct in this scenario？ （）

  A

   A maximum of 3 GB can be allocated to shared pool

  B

   The value for SGA_TARGET can be increased up to a maximum of 15 GB

  C

   A total of 14 GB memory will be allocated to the automatically tuned memory components.

  D

   Increasing the value for SGA_TARGET will automatically increase the memory allocated for STREAMS_POOL_SIZE

  E

   Increasing the value for SGA_TARGET to 12 GB will automatically increase the memory allocated to autotuned parameters

  F

   Reducing the value for SGA_TARGET to 9 GB will automatically decrease the memory allocated to shared pool from 3 GB to 2 GB

  查看答案

• Java浮点数有精度计数法和科学计数法两种表示方式。

  A、对

  B、错

  查看答案

• 铅酸蓄电池在放电过程中，H2SO4浓度（）.

  A、升高

  B、下降

  C、不变

  D、不确定

  查看答案