First there was a HR call which focused on my Resume. Then the HR itself set me a technical phone interview in two days. Then I got a call from Sr. Software Engineer who asked me basic core java questions like, Singleton class and how can you see that it has only one instance Difference between static block and static method How to get duplicate values from database (clue using having clause) difference between observer and observable class what is synchronization and serialization final, finally and finalize how to print all the rows in database Apart from these be prepared with hadoop and mapreduce questions. Now waiting for the result. If selected will be called for onsite.