They dont have budget but still they will take Interview, keep you on hold until they get low salary candidate. 1st round was very good and i cleared it, questions on SQL, data warehouse, unix was asked . 2nd round was simple one, he just asked me process related questions, i am 100% confident on my answers but they waited for 2-3 days and come with rejection . I suspect they got another candidate with lower package. But it should not be the reason of rejection.