One of my friends recently appeared for the interview at NITIE and here is his experience in brief.
The interview panel consists of 5 members. First, there was a general introduction round. Then they asked questions related to the concepts from his B. Tech branch.
If you have any work experience or internship then you will be asked questions about it. If not, questions related to your final year project will be asked. There will be small talks related to your hobbies, background, and other HR questions like why NITIE, etc.
To do well in the interview, improve your communication skills, revise some concepts from your B. Tech, and learn more about generic concepts.