first round was AMCAT (aptitude, english and coding fundamentals ) .Second round was personal interview (technical and hr combined) ,was quiet easy sme basic ques from C or any subject mentioned in the resume .Prepare every thing whatever you claim to know and most important be confident what you speak ( wrong or right ). verbal communication is very important. Last round was telephonic interview with the machine recorded voice called versant test. This round may prove a hurdle ,bt to pass this test you should have clear accent ,good english surely and try not to stuck in the mid of a sentence , if you feel u can't make it then just try to speak any valid words with clear voice close to words which you hear. After this round they will tell you the result. You may practice for the last round on internet there some sites which offers these type of tests. ALL THE BEST!!