Problem

1. Consider a procedure incr with two integer parameters. The procedure adds one to each parameter. Now suppose that it is called with the same variable twice, for example, as incr(i, i). If i is initially 0, what value will it have afterward if call-by-reference is used? How about if copy/restore is used?

2. Pascal has a construction called a record variant, in which a field of a record can hold any one of several alternatives. At run time, there is no sure-fire way to tell which one is in there. Does this feature of Pascal have any implications for remote procedure call? Explain your answer.