Given the code fragment:
Consider below code of Test.java file:
1. package com.sampleproject.oca;
2.
3. class Super {
4. public String num = "10"; //Line n1
5. }
6.
7. class Sub extends Super {
8. protected int num = 20; //Line n2
9. }
10.
11. public class Test {
12. public static void main(String[] args) {
13. Super obj = new Sub();
14. System.out.println(obj.num += 2); //Line n3
15. }
16. }
What will be the result of compiling and executing above code?
Which two statements are true? (Choose two.)
Below is the code of Test.java file:
1. package com.udayan.oca;
2.
3. import java.util.ArrayList;
4. import java.util.List;
5.
6. public class Test {
7. public static void main(String [] args) {
8. List
9.
10. list.add(27);
11. list.add(27);
12.
13. list.add(new Integer(27));
14. list.add(new Integer(27));
15.
16. System.out.println(list.get(0) == list.get(1));
17. System.out.println(list.get(2) == list.get(3));
18. }
19. }
What will be the result of compiling and executing Test class?
How many String objects are there in the HEAP memory, when control is at Line 9?
1. package com.udayan.oca;
2.
3. public class Test {
4. public static void main(String[] args) {
5. String s1 = new String("Java"); //Line 3
6. String s2 = "JaVa"; //Line 4
7. String s3 = "JaVa"; //Line 5
8. String s4 = "Java"; //Line 6
9. String s5 = "Java"; //Line 7
10.
11. int i = 1; //Line 9
12.
13. }
14. }
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