I had 4 rounds of interviews first was aptitude and second was logical third is technical and final is HR. It went really quick and well I had all 4 interview in two days and third day I got my offer letter.

You will have. An amcat test and after that you will be called to the interview. First you will have a introduction sesion, where you have to say about your education qualification and experiences. It's a common interview with for all together. If you are eligible then you will be having 2nd amcat test. After that you will have HR round one on one. At last you will have typing test.