Question 16:
The tnsnames.ora file has an entry for the service alias ORCL as follows:
The TNSPING command executes successfully when tested with ORCL; however, from the same OS user session, you are not able to connect to the database instance with the following command: SQL > CONNECT scott/tiger@orcl - What could be the reason for this?
Answer options:
A. The listener is not running on the database node. B. The TNS_ADMIN environment variable is set to the wrong value. C. The orcl.oracle.com database service is not registered with the listener. D. The DEFAULT_DOMAIN parameter is set to the wrong value in the sqlnet.ora file. E. The listener is running on a different port.