6. Study this tnsnames.ora file:
test = (description = (address_list = (address = (protocol = tcp)(host = serv2)(port = 1521)) ) (connect_data = (service_name = prod) )prod = (address = (protocol = tcp)(host = serv1)(port = 1521))dev = (service_name = dev)Which of the following statements is correct about the connect strings test,
prod, and dev? (Choose all correct answers.)
A. All three are valid.
B. All three can succeed only if the instances are set up for dynamic instance
registration.
C. The test connection will fail, because the connect string doesn’t match the
service name.
D. There will be a port conflict on serv2, because prod and dev try to use the
same port.
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