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Which of the following is not a valid way to establish an initial connection to an Oracle database?
Please select the best answer.
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A. |
With a TNS connect string (t:host:database )
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B. |
With a database link (select * from customer@ny; )
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C. |
With a server connect string (sqlplus /@fred )
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D. |
With a telnet session
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The correct answer is D. Using a telnet session is not a valid way to establish an initial connection to an Oracle database. A telnet session will only establish connections with a server, not the database.
A, B, and C are incorrect because using a TNS connect string, a database link, and a server connect string are all valid ways to establish a database connection.
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