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Which schema object instructs Oracle to connect to remotely access an object of a database?

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Which schema object instructs Oracle to connect to remotely access an object of a database?

(a) Sequence

(b) Remote Link

(c) Database Link

(d) Data Link

I have been asked this question in an interview.

This intriguing question comes from Storing and Guarding the Data in chapter Oracle Database 11g Architecture Options of Oracle

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Best answer
Right answer is (d) Data Link

Best explanation: A DATABASE LINK value references a resource outside the underlying data source through a URL.

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