Two rounds , first was basic tech round checking abilities of oops and problem solving .

Second round was hr cum project round which asked thoroughly about my projects , and try to be crisp about personality questions .

make a class for a library system , where in you can come and read a book or a text file , you can even change the content if you are authorised . while some one is working on the file you can not alter or read the file , basically it was shared access and threading problem .