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Which of the following storage classes have global visibility in C/C++?

  1. Auto
  2. Extern
  3. Static
  4. Register
asked in Others by Veteran (340k points) | 317 views

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option 2


Keyword extern is used for declaring extern variables in c. This modifier is used with all data types like int, float, double, array, pointer, structure, function etc. It is default storage class of all global variables as well all functions.
answered by Active (3.7k points)

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