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C++ Interview Questions

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Method of passing arguments to a function which takes parameter of type reference.

for example:

void swap( int & x, int & y )
 int temp = x;
 x = y;
 y = temp;

int a=2, b=3;

swap( a, b );

Basically, inside the function there won't be any copy of the arguments "x" and "y" instead they refer to original variables a and b. so no extra memory needed to pass arguments and it is more efficient. 

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