Exam 1z0-808 topic 1 question 81 discussion

The correct is A, because m2 object variables x and y are not assigned so, these have default zero values. so the answer is 100:200:0:0 and you can test the code: public class MyField { int x; int y; public void doStuffy(int x, int y) { x = x; y = this.y; } public void display () { System.out.print(x + " " + y + " : "); } public static void main(String[] args) { MyField m1 = new MyField (); m1.x = 100; m1.y = 200; MyField m2 = new MyField(); m2.doStuffy(m1.x, m1.y); m1.display(); m2.display(); } }

Answer is A

A is correct

100 200 : 0 0 :

doStuff method only assign local variables, not affecting instance variables

A is the correct one

100 200 : 0 0 : public class MyField { int x; int y; public void doStuffy(int x, int y) { x = x; y = this.y; } public void display () { System.out.print(x + " " + y + " : "); } public static void main(String[] args) { MyField m1 = new MyField (); m1.x = 100; m1.y = 200; MyField m2 = new MyField(); m2.doStuffy(m1.x, m1.y); m1.display(); m2.display(); } }

A. 100 200 : 0 0 because x =x; if this.x=x then answer is B

B. 100 200 : 100 0

Answer is A.

100 200 : 0 0 :

As below (iSnover comment), Answer is A.

m2 object variables x and y are not assigned so, these have default zero values. so the answer is 100:200:0:0