This code fragment uses arrays in Java. The first line declares and allocates an
ID: 3763558 • Letter: T
Question
This code fragment uses arrays in Java. The first line declares and allocates an array of two integers. The next two lines initialize it. (Java arrays are indexed starting from 0.)
int[] A = new int[2];
A[0] = 0;
A[1] = 2;
f(A[0],A[A[0]]);
Function f is defined as
void f(int x, int y) {
x = 1;
y = 3;
}
For each of the following parameter-passing methods, say what the final values in the array A would be, after the call to f. (There may be more than one correct answer.)
a. By value.
b. By reference.
c. By value-result.
Explanation / Answer
Following Parameter-passing into the given method:
(A) By value
while passing the values into the method f(int x int y) it will assigned with in the method it does not affects the main method. Therefore, the final of array A in the main method are A={0,0}.
(B) By reference
while passing the reference into the method f(int x int y) it will assigned with in the method it does affects the main method. Therefore, the final of array A in the main method are A={1,3}.
(C) By value-result
while passing the value-result into the method f(int x int y) it will assigned with in the method it does not affects the main method. Therefore, the final of array A in the main method are A={0,0}.