Question: The function prototype int foo ( int y , int x = 4 ) ; means: The parameter y is passed by value. The parameter

The function prototype
int foo (int y, int x=4);
means:
The parameter y is passed by value.
The parameter x has a default value of 4
The function foo returns an int value.
All of the above.
The function prototype int foo (int y, int x=4); means: The

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