下面选项中，可作为＜listener＞元素子元素的是（ ） A: ＜listener-name＞ B: ＜listener-url＞ C: ＜class-listener＞ D: ＜listener-class＞

You issue these LSNRCTL commands：  LSNRCTL> SET CURRENT_LISTENER listener01 LSNRCTL> START listener02  What is the result of issuing these commands？（） A: A listener named LISTENER is started. B: A listener named LISTENER01 is started. C: A listener named LISTENER02 is started. D: The START command fails and no listener is started.

通常我们使用( )方法来为一个部件注册事件监听器。 A: add×××Listener B: ×××Listener C: Listener××× D: ×××Listeneradd

Anyone who knows just the host name and the listener name can have full control over the listener. They can stop the listener and also obtain detailed information about the listener， database， and the configuration of the application. How would you avoid this scenario？（） A: lock the listener B: hide the listener C: create multiple listeners D: run listener on a remote client E: set a password for the listener F: store listener.ora in a non-default locatio

Anyone who knows just the host name and the listener name can have full control over the listener. They can stop the listener and also obtain detailed information about the listener， database， and the configuration of the application. How would you avoid this scenario？（） A: lock the listener B: hide the listener C: create multiple listeners D: run listener on a remote client E: set a password for the listener F: store listener.ora in a non-default location

You issue these LSNRCTL commands： LSNRCTL> SET CURRENT_LISTENER listener01 LSNRCTL> START listener02 What is the result of issuing these commands？（） A: AA listener named LISTENER is started. B: BA listener named LISTENER01 is started. C: CA listener named LISTENER02 is started. D: DThe START command fails and no listener is started.

监听事件和处理事件______。 A．都由Listener完成 B．都由相应事件Listener处登记过的构件完成 C．由Listener和构件分别完成 D．由Listener和窗口分别完成

Context of communication concerns several factors, including _____. () A: who is your listener B: what is your relationship with the listener C: what is the distance between you and the listener D: how you want to present yourself

Which statements of the event listener are true A: Multiple listeners can be attached to one component. B: Only one listener can be attached to one component. C: One listener can receive and process the events from multiple components. D: One listener can receive and process the events from only one component.

What does it take to be an active listener?