A customer has a Stock Watch application that publishes stock recommendations to different customers and programs. The stock recommendation message should be processed by only one of the JMS Servers in the cluster. Which JMS model should be used?（） ["JMS Queue","Distributed JMS Queue","Uniform Distributed Topic","Partitioned Distributed Topic"]
下列叙述正确的是（） ["液压封堵器允许进行管线最高温度是180℃的封堵作业","下完封堵头之后，液压胶管不应从封堵器上拆下来","封堵作业对管道介质流速有严格的要求","普通的丁腈橡胶皮碗可以耐150℃高温"]
You performed an incomplete recovery and opened the database with the RESETLOGS option. The LOG_ARCHIVE_FORMAT parameter is set to ’ora_%t_%s_%r.log’. Which statement regarding the archived redo log files， created in an earlier incarnation of the database，is true？（） [" The archived redo log files will be overwritten."," The archived redo log files are deleted automatically."," The archived redo log files should be moved to some other location."," The archived redo log files are still maintained because the file names are unique."]
The database users are connecting to the PROD database from different applications， thereby degrading the database performance. The senior database administrator suspects the large number of concurrent connections to be the reason for low performance and asks you to restrict the number concurrent connections per database user to one. Which action would you take to achieve this objective？（） ["set the SESSIONS to 1 in the parameter file","grant SINGLE SESSION privilege to all of the users","set the SESSIONS_PER_USER to 1 in the users’ profile","grant RESTRICTED SESSION privilege to all of the database users","create a role with SINGLE SESSION privilege and assign the role to the user"]
若J产业的区位商大于1，则说明（） ["A.J产业在该地区专业化程度超过全国 ","B.J产业在该地区发展缓慢 ","C.J产业在该地区专业化程度不高 ","D.J产业在该地区专业化程度低于全国"]
烈性噬菌体对细菌的侵染过程？
