Free Oracle 1Z0-808 Exam Questions

What will be the result of compiling and executing Test class?

package com.udayan.oca;

public class Test {

     static String msg; //Line 2

     public static void main(String[] args) {

         String msg; //Line 4

         if(args.length > 0) {

             msg = args[0]; //Line 6

         }

         System.out.println(msg); //Line 8

     }

}

Consider below code of Test.java file:

1. package com.sampleproject.oca; 

2.  

3. public class Test {

4.     public static void main(String[] args) {

5.         /*INSERT*/ x = 7, y = 200;

6.         System.out.println(String.valueOf(x + y).length());

7.     }

8. }

Which of the following options, if used to replace /*INSERT*/, will compile successfully and on execution will print 3 on to the console?

Select 3 options.

Range of short data type is from -32768 to 32767

Which of the following code segments, written inside main method will compile successfully?

Select 3 options.

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?

Consider the following class:

1. package com.udayan.oca;

2.  

3. public class Employee {

4.      public int passportNo; //line 2

5. }

Which of the following is the correct way to make the variable 'passportNo' read only for any other class?