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Your database is open and the LISTENER listener is running. The new DBA of the system stops thelistener by using the command：  LSNRCTL> STOP  What happens to the sessions that are presently connected to the database instance（）
A:The sessions are able to perform only queries.
B:The sessions are not affected and continue to function normally.
C:The sessions are terminated and the active transactions are rolled back.
D:The sessions are not allowed to perform any operations till the listener is started.

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出自：Oracle认证

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