Free Oracle 1Z0-808 Exam Questions

Consider below code:

1. //Test.java

2. package com.udayan.oca;

3.  

4. public class Test {

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

6.         StringBuilder sb = new StringBuilder(100);

7.         System.out.println(sb.length() + ":" + sb.toString().length());

8.     }

9. }

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

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

package com.udayan.oca;

public class Test {

     public static void main(String[] args) {

         String str1 = " ";

         boolean b1 = str1.isEmpty();

         System.out.println(b1);

         str1.trim();

         b1 = str1.isEmpty();

         System.out.println(b1);

     }

}

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 list = new ArrayList();

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?

Given the code fragment:

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

package com.udayan.oca;

public class Test {

    public static void main(String[] args) {

        m1(null);

    }

    static void m1(CharSequence s) {

        System.out.println("CharSequence");

    }

    static void m1(String s) {

        System.out.println("String");

    }

    static void m1(Object s) {

        System.out.println("Object");

    }

}