level 1 : 12 Step by step interview question to crack the interview.

1. what do u mean by reusing the code ? do u think oops provides the ways to reuse code ? write a simple code if you think so ?

2. what will be the output of the following code ?

public class callkr_parents{

       static char A='A';

}

class callkr_child extends callkr_parents{

       public static void main(String args[]){

              int x=A;

              System.out.println(A);

       }

}

3. what is polymorphism in java ? Do you know 'pintln()' method is best example of polymorphism?

4. which args is wrong for calling println method in below 

Println (20);                                               S.o.println (new Temp());

      Println ("callkr");                                          S.o.println (null);

      Println (10.0f);                                            S.o.println (10.0);

5. Why 'new' is called as operator in java as we know operator are (+,-,*.......etc). Justify your answer?

6. Do u know other operator like new?

7. What is heap memory and buffer in java and where we can find them ?

8. what is variable and reference variable ?

9. what we hold in reference variable ;

10.what is difference between reference id and reference variable and this in java ?