Given the following method header, which of these method calls is incorrect? public void displayValue(double x, int y);
A) displayValue(a, b); // where a is a long and b is a byte
B) displayValue(a, b); // where a is an int and b is a byte
C) displayValue(a, b); // where a is a short and b is a long
D) All of these would give an error.

Question

Quizplus · Accepted Answer

In Java, when calling a method, automatic type promotion can occur if the actual parameters are compatible with the method's formal parameters. For the method `displayValue(double x, int y)`, the first parameter expects a `double` and the second expects an `int`. In options A and B, `a` can be automatically promoted to `double` from `long` and `int` respectively, and `b` can be promoted to `int` from `byte`. However, in option C, while `a` (a `short`) can be promoted to `double`, `b` (a `long`) cannot be automatically promoted to `int` because `long` is a larger data type than `int`, which would lead to a potential loss of precision.

Given the Following Method Header, Which of These Method Calls