Which one of the following statements about the TNSPING utility is correct?()
- A、It helps you to determine whether or not the Oracle database is running.
- B、It requires the username and password to check the connectivity of the service.
- C、It does not require the username and password to check the connectivity of the service.
- D、It establishes a session with the database and checks the connectivity of the service.
正确答案:B
答案解析:有
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