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Answer/Explaination
:
Linker Error : Undefined symbol '_i'
(Exp):
extern storage class in the following declaration,
extern int i;
specifies to the compiler that the memory for i is allocated in some
other program and
that address will be given to the current program at the time of
linking. But linker finds
that no other variable of name i is available in any other program
with memory space
allocated for it. Hence a linker error has occurred .
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