Nokia Interview Written Test and Questions

Class C extends B and B extends A and how can I directly access a method of A from class C without creating an instance of A.

Options:

1. super.test()
2. super.super.test()
3. There is no way we can access the class A method without creating an instance from class C.

Answer is 3

Here is the example code (they are not given this code, I only wrote for understanding clearly)



1. class A{
    public A(){
        System.out.println("A");   
    }
    public void test(){
        System.out.println("test method of A");
    }

}
class B extends A{
    public B(){
        System.out.println("B");   
    }
    public void test(){
        System.out.println("test method of B");
    }

}

class C extends B{
    public C(){
               System.out.println("C");   
    }

    public void test(){
        System.out.println("test method of C");
    }


}


public class SuperKeyWord{
    public static void main(String args[]){
        C c = new C();
    }
}


Question 2:
Write an immutable java class example.

Question 3:
Write a java program to reverse a given string.

Question 4:
Choose all right answers from the below options.

     a. public synchronized(this) void test(){}
     b. public void test(){ synchronized(Test.class){}}
     c. public void test(){ synchronized(a) {}}
     d. public synchronized void test {}
     e. public void test{ synchronized(this) {}}