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Oracle TNS- Quiz

Each question is worth one point. Select the best answer or answer for each question.
 
1. Which of the following is not a valid way to establish an initial connection to an Oracle database?
Please select the best answer.
  A. With a TNS connect string (t:host:database)
  B. With a database link (select * from customer@ny;)
  C. With a server connect string (sqlplus /@fred)
  D. With a telnet session

2. What is the name of the Oracle meta-table used to view database link information?
Please select the best answer.
  A. DBA_TABLES
  B. DBA_DB_LINKS
  C. DBA_SYNONYMS
  D. DBA_2PC_PENDING

3. Which of the following files are used to supply the server IP address?
Please select all the correct answers.
  A. The file /etc/hosts
  B. The file /etc/services
  C. The file tnsnames.ora
  D. The file sqlnet.ora

4. Which of the following files supplies the protocol information for outgoing Oracle requests?
Please select the best answer.
  A. listener.ora
  B. sqlnet.ora
  C. /etc/hosts
  D. tnsnames.ora