You are working on a test database where instance recovery takes a considerable amount of time. How can reduce the recovery time？（） By multiplexing the control files。 By multiplexing the redo log files。 By decreasing the size of redo log files。 By configuring mean time to recover （MTTR） to a lower value。 By setting the UNDO_RETENTION parameter to a higher value。
不能用于交流鼠笼式异步电动机的调速控制方法是（）。 A、变电源频率调速 。 B、变极对数调速 。 C、串级调速 。 D、变电源电压调速。
A recently installed package needs to be rolled back to a previous version. Which of the following commands will perform the task？（） reject。 cleanup。 deinstall。 uninstall。
下列符合发票管理规定的是（）。 增值税专用发票由国务院税务主管部门指定的企业印制。 普通发票可以到任意印刷企业印制。 普通发票由县级国家税务局、地方税务局指定企业印制。 账簿、记账凭证、完税凭证及其他有关资料不得伪造、变造或者擅自损毁。
A network administrator wants to analyze the historical performance of the servers in the organization and forecast the system performance needs into the future. Which add-on component of IBM Director would be used to assist with this task？（） Capacity Manager。 Resource Monitors。 System Availability。 System Performance Monitor。
Which is not a valid locale definition file type?（）
