1Z0-809 Question #119: Real Exam Question with Answer & Explanation

Given: package p1; public interface DoInterface { void m1(int n); public void m2(int n); } package p3; import p1.DoInterface; public class DoClass implements DoInterface { int x1, x2; DoClass() { this.x1 = 0; this.x2 = 10; } public void m1(int p1) { x1+=p1; System.out.println(x1); } // line n2 public void m2(int p1) { x2+=p1; System.out.println(x2); } } package p2; import p1.; import p3.; class Test { public static void main(String[] args) { // line n3 DoInterface doi = new DoClass(); doi.method1(100); doi.method2(200); } } What is the result?