Cognizant Programmer Analyst Trainee interview questions

I was selected via campus Interview. The interview was very easy. It was for about 20 minutes. During this, the interviewer asked me about myself, basically my project. He asked me to implement linked list. Then about some operating system questions and some compiler questions; all of which were quite easy. Then some chit-chat.

First round was written test.the written test contains quant,verbal and lr.the next round is technical and hr round.The HR round is crucial where they gonna check the communication skills