Given the code fragment:
What will be the result of compiling and executing class Test?
1. package com.udayan.ocp;
2.
3. class X {
4. class Y {
5. private void m() {
6. System.out.println("INNER");
7. }
8. }
9.
10. public void invokeInner() {
11. Y obj = new Y(); //Line 9
12. obj.m(); //Line 10
13. }
14. }
15.
16. public class Test {
17. public static void main(String[] args) {
18. new X().invokeInner();
19. }
20. }
You want to create a singleton class by using the Singleton design pattern. Which two statements enforce the singleton nature of the design? (Choose two.)
What will be the result of compiling and executing class M?
1. package com.udayan.ocp;
2.
3. class M {
4. private int num1 = 100;
5. class N {
6. private int num2 = 200;
7. }
8.
9. public static void main(String[] args) {
10. M outer = new M();
11. M.N inner = outer.new N();
12. System.out.println(outer.num1 + inner.num2);
13. }
14. }
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