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To use external linkage we have to use which keyword?

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To use external linkage we have to use which keyword?

(a) static

(b) extern

(c) const

(d) argc

This question was addressed to me in an interview for job.

The origin of the question is Linkage topic in section Source Files, Classes and Operator Overloading in C++ of C++

1 Answer

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Best answer
Right answer is (b) extern

The best I can explain: Extern keyword is used to represent identifiers from other programs.

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