I attended off campus drive of Cognizant. There were three rounds 1. Aptitude test ( was conducted by AMCAT ) 2. Technical Interview 3. HR interview Aptitude test had 3 sections. Quant Logical reasoning English Test was not that hard and lot of sample papers are available online which one can refer to. I was able to clear it and received a mail after 2 days that I am short listed for interview rounds which were on Sunday. Tech round. Just get thorough with your resume. I was asked questions about my projects. Summer Trainings and Basics of OOPS, function overloading, operator overloading etc. it went on for 40 mins. Then I was asked to wait outside for 5 mins for result of this round. After 2 mins I was told I need to go downstairs and wait for my HR round. I waited for an hour in a hall for my HR round. HR round : HR was easy. Was asked to introduce myself ( be confident and fluent ) I was asked what I knew about Cognizant ( I mentioned everything that I had read on Internet ) Why I want to join Cognizant? As I am from ECE. I was asked why I want to be in IT company. Just focus on giving straight forward answers to questions asked. Be honest and confident. :)

Two interviews with coding test and and aptitute test , pretty easy , aske about projects done and java oops questions also sql question , position was full stack developer