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单选题
监听事件和处理事件（）
A
都由Listener完成
B
由Listener和窗口分别完成
C
由Listener和构件分别完成
D
都由相应事件Listener处登记过的构件完成
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考题
Your database is open and the LISTENER listener running. You stopped the wrong listener LISTENER byissuing the following command:lsnrctl >STOPWhat happens to the sessions that are presently connected to the database Instance?（）A. They are able to perform only queries.B. They are not affected and continue to function normally.C. They are terminated and the active transactions are rolled back.D. They are not allowed to perform any operations until the listener LISTENER is started
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通常我们使用( )方法来为一个部件注册事件监听器。A.add×××ListenerB.×××ListenerSX
通常我们使用（ ）方法来为一个部件注册事件监听器。A.add×××ListenerB.×××ListenerC.Listener×××D.×××Listeneradd
考题
监听事件和处理事件______。A．都是由Listener完成B．都由相应事件Listener处登记过的组件完成C．由Listener和窗口分别完成D．由Listener和组件分别完成
考题
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A.TNSNAMES.ORA和SQLNET.ORAB.TNSNAMES.ORA和LISTENER.ORAC.TNSNAMES.ORA和INIT.ORAD.SQLNET.ORA和LISTENER.ORAE.INIT.ORA和LISTENER.ORA
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所有AbstractButton组件都实现了（）A、Action Listener 接口B、Serializable Listener 接口C、Change Listener 接口D、Item Listener 接口
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以下（）有关事件监听器的语句是正确的。A、Multiple listeners can be attached to one componentB、Only one listener can be attached to one componentC、One listener can receive and process the events from multiple componentsD、One listener can receive and process the events from only one component
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You work as a database administrator for Supportcenter.cn. When you tried to connect to the database， you received the following error： ERROR： ORA-12541：TNS：no_listener You found that the listener is not running on the server， so you issued the following command in the Listener Control utility to start the listener. lsnrctlSTART What statement is true？（）A、It would attempt to start the default listenerB、It would start the most recently created listener.C、It would display an error with a message asking for the listener name to be specified.D、It would show you a list of listeners and prompts for the listener name that you want to start.
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You want your listener to be password protected to prevent it from being shut down. You want to accomplish this task while the listener is functional. Which method could you use to achieve this objective？（）A、 Use the CHANGE_PASSWORD command of the Listener control utility.B、 Use the SET PASSWORD and SAVE_CONFIG commands of the Listener control utility.C、 Use the CHANGE_PASSWORD and SAVE_CONFIG commands of the Listener control utility.D、 Manually modify the listener.ora file to include the password for the listener and restart the listener.
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客户端用于网络连接的两个配置文件文件是（）A、TNSNAMES.ORA和SQLNET.ORAB、TNSNAMES.ORA和LISTENER.ORAC、TNSNAMES.ORA和INIT.ORAD、SQLNET.ORA和LISTENER.ORAE、INIT.ORA和LISTENER.ORA
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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 listenerB、hide the listenerC、create multiple listenersD、run listener on a remote clientE、set a password for the listenerF、store listener.ora in a non-default location
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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.
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单选题客户端用于网络连接的两个配置文件文件是（）A
TNSNAMES.ORA和SQLNET.ORAB
TNSNAMES.ORA和LISTENER.ORAC
TNSNAMES.ORA和INIT.ORAD
SQLNET.ORA和LISTENER.ORAE
INIT.ORA和LISTENER.ORA
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单选题通常，一个Web服务可以分为4个逻辑层，分别为数据层（Data Layer）、数据访问层（Data Access Layer）、业务层（Business Layer）和监听者（Listener）。离客户端最近的是监听者，离客户最远的是（）。A
数据层（Data Layer）B
数据访问层（Data Access Layer）C
业务层（Business Layer）D
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考题
单选题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 listenerB
hide the listenerC
create multiple listenersD
run listener on a remote clientE
set a password for the listenerF
store listener.ora in a non-default location
考题
单选题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.
考题
单选题所有AbstractButton组件都实现了（）A
Action Listener 接口B
Serializable Listener 接口C
Change Listener 接口D
Item Listener 接口
考题
单选题You want your listener to be password protected to prevent it from being shut down. You want to accomplish this task while the listener is functional. Which method could you use to achieve this objective？（）A
Use the CHANGE_PASSWORD command of the Listener control utility.B
Use the SET PASSWORD and SAVE_CONFIG commands of the Listener control utility.C
Use the CHANGE_PASSWORD and SAVE_CONFIG commands of the Listener control utility.D
Manually modify the listener.ora file to include the password for the listener and restart the listener.
考题
单选题Your database is open and the LISTENER listener running. You stopped the wrong listener LISTENER byissuing the following command:lsnrctl STOPWhat happens to the sessions that are presently connected to the database Instance?（）A
They are able to perform only queries.B
They are not affected and continue to function normally.C
They are terminated and the active transactions are rolled back.D
They are not allowed to perform any operations until the listener LISTENER is started
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