Weird interviewer. First of all this person had a very bad accent and I was unable to follow him at all, then he starts asking me all sort of "trick" questions in Java some being very basic for a Sr. level engineer that I was. I provided basic answers for basic questions and asked him if there was some scenario that he was looking for or what he wanted to test me on. It seems like he was expecting me to just memorize everything from the text and tell him everything as it's supposed to be memorized. I specifically asked him what kind of detail he wanted with what he asked me but he was sort of behaving like I was not good enough or I did not know. Also, one of the reasons they said they didn't like me was that I didn't have any Big Data experience when I did not even have 1 word of that on my resume. WEIRD!

1st round of interview would be written test of basic java programs. 2nd and 3rd rounds would be technical. try to add logic to your programs than using the in built methods.