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多項選擇題

View the Exhibit and examine the output. 
Which two statements are true regarding the LISTENER2 listener()

A.The ORCL instance is registered dynamically with the listener.
B.The ORCL instance is registered statically in the listener.ora file.
C.The number of current client connections handled by the service handler is two.
D.The total number of client connections handled so far by the service handler is two

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