Multiple choice technology mainframe

What do we call the PRIMARY KEY of a reference table?

  1. Alternate Key

  2. Foreign Key

  3. Unique Key

  4. Alias Key

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B Correct answer
Explanation

In relational database design, the primary key of a referenced table becomes a foreign key in the referencing table. The question is slightly ambiguous as the primary key itself is a primary key, but in the context of referencing, it acts as a foreign key. An alternate or alias key is incorrect.