I'm an extc engineer and during my final year I got placed in cognizant. Firstly there was resume shortlisting by the company followed by aptitude test which was easy. After clearing this round, there was a communication round of about 15 mins. Then there was the interview and it was scheduled on zoom meeting. The interview lasted for about an hour. They do ask all the basic questions related to the job role and go in depth of your resume. Basically never lie on your resume. After all the technical questions, they asked me logical/problem solving questions based on real life scenario. The interview went really well for me and by the end I was somewhat sure about my selection.